tree\nav支持svg icon

packages/amis-ui/scss/components/_menu.scss

@@ -230,6 +230,9 @@
     svg {
       float: left;
     }
+    svg {
+      top: 0;
+    }
   }
 
   &-item-icon {

packages/amis-ui/src/components/Tree.tsx

@@ -1242,15 +1242,7 @@ export class TreeSelector extends React.Component<
                     : this.handleSelect(item))
                 }
               >
-                {iconValue ? (
-                  getIcon(iconValue) ? (
-                    <Icon icon={iconValue} className="icon" />
-                  ) : React.isValidElement(iconValue) ? (
-                    iconValue
-                  ) : (
-                    <i className={iconValue}></i>
-                  )
-                ) : null}
+                {iconValue ? <Icon icon={iconValue} className="icon" /> : null}
               </i>
             ) : null}
 

packages/amis/src/renderers/Nav.tsx

@@ -655,7 +655,7 @@ export class Navigation extends React.Component<
                   <Icon
                     key={`icon-${i}`}
                     cx={cx}
-                    icon={item['icon']}
+                    icon={item['icon'] || item}
                     className={isCollapsedNode ? '' : isAfter ? 'ml-2' : 'mr-2'}
                   />
                 );