Attach to DOM in specs that alter the mini editor

This is now required since populateList() is only
calls when the timeout is fired and the select list
is still on the DOM.

src/packages/autocomplete/spec/autocomplete-spec.coffee

@@ -288,6 +288,9 @@ describe "AutocompleteView", ->
       expect(editor.lineForBufferRow(10)).toBe matchToSelect.text()
 
   describe "when the mini-editor receives keyboard input", ->
+    beforeEach ->
+      editor.attachToDom()
+
     describe "when text is removed from the mini-editor", ->
       it "reloads the match list based on the mini-editor's text", ->
         editor.getBuffer().insert([10,0] ,"t")