making the editor .focused .is-focused for symmetry

src/app/editor.coffee

@@ -351,11 +351,11 @@ class Editor extends View
     @hiddenInput.on 'focus', =>
       @rootView()?.editorFocused(this)
       @isFocused = true
-      @addClass 'focused'
+      @addClass 'is-focused'
 
     @hiddenInput.on 'focusout', =>
       @isFocused = false
-      @removeClass 'focused'
+      @removeClass 'is-focused'
       @autosave() if config.get "editor.autosave"
 
     @underlayer.on 'click', (e) =>

src/app/text-mate-theme.coffee

@@ -44,17 +44,17 @@ class TextMateTheme extends Theme
         'color': @translateColor(foreground)
 
     @rulesets.push
-      selector: '.editor.focused .cursor'
+      selector: '.editor.is-focused .cursor'
       properties:
         'border-color': @translateColor(caret)
 
     @rulesets.push
-      selector: '.editor.focused .selection .region'
+      selector: '.editor.is-focused .selection .region'
       properties:
         'background-color': @translateColor(selection)
 
     @rulesets.push
-      selector: '.editor.focused .line-number.cursor-line-no-selection, .editor.focused .line.cursor-line'
+      selector: '.editor.is-focused .line-number.cursor-line-no-selection, .editor.is-focused .line.cursor-line'
       properties:
         'background-color': @translateColor(lineHighlight)