Wait for components being mounted before initializing FilteredSearchDropdownManager

app/assets/javascripts/boards/boards_bundle.js

@@ -95,9 +95,6 @@ $(() => {
       });
       Store.rootPath = this.boardsEndpoint;
 
-      this.filterManager = new FilteredSearchBoards(Store.filter, true, [(this.milestoneTitle ? 'milestone' : null)]);
-      this.filterManager.setup();
-
       // Listen for updateTokens event
       eventHub.$on('updateTokens', this.updateTokens);
     },
@@ -105,6 +102,9 @@ $(() => {
       eventHub.$off('updateTokens', this.updateTokens);
     },
     mounted () {
+      this.filterManager = new FilteredSearchBoards(Store.filter, true, [(this.milestoneTitle ? 'milestone' : null)]);
+      this.filterManager.setup();
+
       Store.disabled = this.disabled;
       gl.boardService.all()
         .then(response => response.json())