!695 下拉图标选择组件优化：1.已选择图标高亮回显 2.滚动条采用el-scrollbar

Merge pull request !695 from 绿色心情/icon-select

 #app {
 #app {
 
 
   .main-container {
   .main-container {
-    min-height: 100%;
+    height: 100%;
     transition: margin-left .28s;
     transition: margin-left .28s;
     margin-left: $base-sidebar-width;
     margin-left: $base-sidebar-width;
     position: relative;
     position: relative;

 <!-- @author zhengjie -->
 <!-- @author zhengjie -->
 <template>
 <template>
   <div class="icon-body">
   <div class="icon-body">
-    <el-input v-model="name" style="position: relative;" clearable placeholder="请输入图标名称" @clear="filterIcons" @input="filterIcons">
+    <el-input v-model="name" class="icon-search" clearable placeholder="请输入图标名称" @clear="filterIcons" @input="filterIcons">
       <i slot="suffix" class="el-icon-search el-input__icon" />
       <i slot="suffix" class="el-icon-search el-input__icon" />
     </el-input>
     </el-input>
     <div class="icon-list">
     <div class="icon-list">
-      <div v-for="(item, index) in iconList" :key="index" @click="selectedIcon(item)">
-        <svg-icon :icon-class="item" style="height: 30px;width: 16px;" />
-        <span>{{ item }}</span>
+      <el-scrollbar>
+        <div class="list-container">
+          <div v-for="(item, index) in iconList" class="icon-item-wrapper" :key="index" @click="selectedIcon(item)">
+            <div :class="['icon-item', { active: activeIcon === item }]">
+              <svg-icon :icon-class="item" class-name="icon" style="height: 30px;width: 16px;" />
+              <span :title="item">{{ item }}</span>
             </div>
             </div>
           </div>
           </div>
         </div>
         </div>
+      </el-scrollbar>
+    </div>
+  </div>
 </template>
 </template>
 
 
 <script>
 <script>
 import icons from './requireIcons'
 import icons from './requireIcons'
 export default {
 export default {
   name: 'IconSelect',
   name: 'IconSelect',
+  props: {
+    activeIcon: {
+      type: String
+    }
+  },
   data() {
   data() {
     return {
     return {
       name: '',
       name: '',
@@ -46,22 +57,55 @@ export default {
   .icon-body {
   .icon-body {
     width: 100%;
     width: 100%;
     padding: 10px;
     padding: 10px;
+    .icon-search {
+      position: relative;
+      margin-bottom: 5px;
+    }
     .icon-list {
     .icon-list {
       height: 200px;
       height: 200px;
-      overflow-y: scroll;
-      div {
+      ::v-deep .el-scrollbar {
+        height: 100%;
+        .el-scrollbar__wrap {
+          overflow-x: hidden;
+        }
+      }
+      .list-container {
+        display: flex;
+        flex-wrap: wrap;
+        .icon-item-wrapper {
+          width: calc(100% / 3);
           height: 30px;
           height: 30px;
           line-height: 30px;
           line-height: 30px;
           margin-bottom: -5px;
           margin-bottom: -5px;
           cursor: pointer;
           cursor: pointer;
-        width: 33%;
-        float: left;
+          display: flex;
+          .icon-item {
+            display: flex;
+            max-width: 100%;
+            height: 100%;
+            padding: 0 2px;
+            &:hover {
+              background: #ececec;
+              border-radius: 5px;
+            }
+            .icon {
+              flex-shrink: 0;
             }
             }
             span {
             span {
               display: inline-block;
               display: inline-block;
               vertical-align: -0.15em;
               vertical-align: -0.15em;
               fill: currentColor;
               fill: currentColor;
+              padding-left: 2px;
               overflow: hidden;
               overflow: hidden;
+              text-overflow: ellipsis;
+              white-space: nowrap;
+            }
+          }
+          .icon-item.active {
+            background: #ececec;
+            border-radius: 5px;
+          }
+        }
       }
       }
     }
     }
   }
   }

 <template>
 <template>
   <div :class="classObj" class="app-wrapper" :style="{'--current-color': theme}">
   <div :class="classObj" class="app-wrapper" :style="{'--current-color': theme}">
-    <el-scrollbar>
       <div v-if="device==='mobile'&&sidebar.opened" class="drawer-bg" @click="handleClickOutside"/>
       <div v-if="device==='mobile'&&sidebar.opened" class="drawer-bg" @click="handleClickOutside"/>
       <sidebar v-if="!sidebar.hide" class="sidebar-container"/>
       <sidebar v-if="!sidebar.hide" class="sidebar-container"/>
       <div :class="{hasTagsView:needTagsView,sidebarHide:sidebar.hide}" class="main-container">
       <div :class="{hasTagsView:needTagsView,sidebarHide:sidebar.hide}" class="main-container">
+        <el-scrollbar>
           <div :class="{'fixed-header':fixedHeader}">
           <div :class="{'fixed-header':fixedHeader}">
             <navbar/>
             <navbar/>
             <tags-view v-if="needTagsView"/>
             <tags-view v-if="needTagsView"/>
@@ -12,9 +12,9 @@
           <right-panel>
           <right-panel>
             <settings/>
             <settings/>
           </right-panel>
           </right-panel>
-      </div>
         </el-scrollbar>
         </el-scrollbar>
       </div>
       </div>
+  </div>
 </template>
 </template>
 
 
 <script>
 <script>

@@ -134,7 +134,7 @@
                 trigger="click"
                 trigger="click"
                 @show="$refs['iconSelect'].reset()"
                 @show="$refs['iconSelect'].reset()"
               >
               >
-                <IconSelect ref="iconSelect" @selected="selected" />
+                <IconSelect ref="iconSelect" @selected="selected" :active-icon="form.icon" />
                 <el-input slot="reference" v-model="form.icon" placeholder="点击选择图标" readonly>
                 <el-input slot="reference" v-model="form.icon" placeholder="点击选择图标" readonly>
                   <svg-icon
                   <svg-icon
                     v-if="form.icon"
                     v-if="form.icon"