Add param to skip enterCallback

app/assets/javascripts/gl_dropdown.js.coffee

@@ -108,6 +108,7 @@ class GitLabDropdown
       @filterInput = @getElement(FILTER_INPUT)
       @highlight = false
       @filterInputBlur = true
+      @enterCallback = true
     } = @options
 
     self = @
@@ -147,7 +148,8 @@ class GitLabDropdown
           @parseData data
           @highlightRow 1
         enterCallback: =>
-          @selectFirstRow()
+          if @enterCallback
+            @selectFirstRow()
 
     # Event listeners
     @dropdown.on "shown.bs.dropdown", @opened

app/assets/javascripts/search_autocomplete.js.coffee

@@ -56,6 +56,7 @@ class @SearchAutocomplete
         filterable: true
         filterRemote: true
         highlight: true
+        enterCallback: false
         filterInput: 'input#search'
         search:
           fields: ['text']