Rename SelectionView.destroyed to .needsRemoval to match CursorView

src/app/editor.coffee

@@ -796,7 +796,7 @@ class Editor extends View
       @newSelections = []
 
     for selectionView in @getSelectionViews()
-      if selectionView.destroyed
+      if selectionView.needsRemoval
         selectionView.remove()
       else
         selectionView.updateDisplay()

src/app/selection-view.coffee

@@ -8,13 +8,13 @@ class SelectionView extends View
     @div class: 'selection'
 
   regions: null
-  destroyed: false
+  needsRemoval: false
 
   initialize: ({@editor, @selection} = {}) ->
     @regions = []
     @selection.on 'screen-range-changed', => @editor.requestDisplayUpdate()
     @selection.on 'destroyed', =>
-      @destroyed = true
+      @needsRemoval = true
       @editor.requestDisplayUpdate()
 
   updateDisplay: ->