Merge pull request #303 from pano9000/fix_context-menu-visibility

fix(contextMenu.less): fix context menu visibility

Author: SSShooter

src/plugin/contextMenu.less

@@ -1,4 +1,4 @@
-.mind-elixir .context-menu {
+.map-container .context-menu {
   position: fixed;
   top: 0;
   left: 0;
@@ -52,7 +52,7 @@
   }
 }
 
-.mind-elixir .tips {
+.map-container .tips {
   position: absolute;
   bottom: 20px;
   left: 50%;