rename remaining static css files to less

src/app/editor.coffee

@@ -61,7 +61,7 @@ class Editor extends View
     else
       {editSession, @mini} = (editSessionOrOptions ? {})
 
-    requireStylesheet 'editor.css'
+    requireStylesheet 'editor.less'
 
     @id = Editor.nextEditorId++
     @lineCache = []

src/app/select-list.coffee

@@ -20,7 +20,7 @@ class SelectList extends View
   cancelling: false
 
   initialize: ->
-    requireStylesheet 'select-list.css'
+    requireStylesheet 'select-list.less'
 
     @miniEditor.getBuffer().on 'changed', => @schedulePopulateList()
     @miniEditor.on 'focusout', => @cancel() unless @cancelling

src/app/window.coffee

@@ -26,14 +26,14 @@ window.setUpEnvironment = ->
 
   requireStylesheet 'reset.less'
   requireStylesheet 'atom.less'
-  requireStylesheet 'tabs.css'
-  requireStylesheet 'tree-view.css'
-  requireStylesheet 'status-bar.css'
+  requireStylesheet 'tabs.less'
+  requireStylesheet 'tree-view.less'
+  requireStylesheet 'status-bar.less'
   requireStylesheet 'command-panel.less'
-  requireStylesheet 'fuzzy-finder.css'
-  requireStylesheet 'overlay.css'
-  requireStylesheet 'popover-list.css'
-  requireStylesheet 'notification.css'
+  requireStylesheet 'fuzzy-finder.less'
+  requireStylesheet 'overlay.less'
+  requireStylesheet 'popover-list.less'
+  requireStylesheet 'notification.less'
   requireStylesheet 'markdown.less'
 
   if nativeStylesheetPath = require.resolve("#{platform}.css")