tweak icon size and design

components/menu/style/index.less

@@ -157,7 +157,7 @@
     .@{iconfont-css-prefix} {
       min-width: 14px;
       margin-right: 10px;
-      font-size: @font-size-base + 2px;
+      font-size: @font-size-base;
       transition: font-size .15s @ease-out, margin .3s @ease-in-out;
       + span {
         transition: opacity .3s @ease-in-out, width .3s @ease-in-out;

components/popconfirm/index.tsx

@@ -34,7 +34,7 @@ class Popconfirm extends React.Component<PopconfirmProps, PopconfirmState> {
     placement: 'top',
     trigger: 'click',
     okType: 'primary',
-    icon: <Icon type="exclamation-circle" />,
+    icon: <Icon type="exclamation-circle" theme="filled" />,
   };
 
   static getDerivedStateFromProps(nextProps: PopconfirmProps) {

components/popover/style/index.less

@@ -79,10 +79,9 @@
     position: relative;
     > .@{iconfont-css-prefix} {
       position: absolute;
-      top: 4px + 3px; // 4px for padding-top, 3px for vertical middle;
+      top: 8px; // 4px for padding-top, 4px for vertical middle;
       color: @warning-color;
-      line-height: @line-height-base + 0.1;
-      font-size: @font-size-base + 2px;
+      font-size: @font-size-base;
     }
     &-title {
       padding-left: @font-size-base + 8px;

components/style/themes/default.less

@@ -449,7 +449,7 @@
 @breadcrumb-base-color:        @text-color-secondary;
 @breadcrumb-last-item-color:   @text-color;
 @breadcrumb-font-size:         @font-size-base;
-@breadcrumb-icon-font-size:    @font-size-sm;
+@breadcrumb-icon-font-size:    @font-size-base;
 @breadcrumb-link-color:        @text-color-secondary;
 @breadcrumb-link-color-hover:  @primary-5;
 @breadcrumb-separator-color:   @text-color-secondary;