bugfix and performance improvements

src/layout/components/Sidebar/SidebarItem.vue

@@ -16,7 +16,6 @@
           :class="{ 'submenu-title-noDropdown': !isNest }"
         >
           <svg-icon
-            style="flex: 1"
             :icon-class="
               onlyOneChild.meta.icon || (item.meta && item.meta.icon)
             "
@@ -50,7 +49,7 @@
       popper-append-to-body
     >
       <template v-if="item.meta" #title>
-        <svg-icon style="flex: 1" :icon-class="item.meta && item.meta.icon" />
+        <svg-icon :icon-class="item.meta && item.meta.icon" />
         <span
           class="menu-title"
           style="flex: 8"