Destroy only containing folds on selection

src/selection.coffee

@@ -100,7 +100,7 @@ class Selection extends Model
     bufferRange = Range.fromObject(bufferRange)
     @needsAutoscroll = options.autoscroll
     options.reversed ?= @isReversed()
-    @editor.destroyFoldsIntersectingBufferRange(bufferRange) unless options.preserveFolds
+    @editor.destroyFoldsContainingBufferRange(bufferRange) unless options.preserveFolds
     @modifySelection =>
       needsFlash = options.flash
       delete options.flash if options.flash?
@@ -251,8 +251,7 @@ class Selection extends Model
 
   # Public: Selects all the text in the buffer.
   selectAll: ->
-    @editor.unfoldAll()
-    @setBufferRange(@editor.buffer.getRange(), autoscroll: false, preserveFolds: true)
+    @setBufferRange(@editor.buffer.getRange(), autoscroll: false)
 
   # Public: Selects all the text from the current cursor position to the
   # beginning of the line.

src/text-editor.coffee

@@ -2241,7 +2241,7 @@ class TextEditor extends Model
   # Returns the new {Selection}.
   addSelection: (marker, options={}) ->
     unless marker.getProperties().preserveFolds
-      @destroyFoldsIntersectingBufferRange(marker.getBufferRange())
+      @destroyFoldsContainingBufferRange(marker.getBufferRange())
     cursor = @addCursor(marker)
     selection = new Selection(_.extend({editor: this, marker, cursor}, options))
     @selections.push(selection)
@@ -2776,12 +2776,15 @@ class TextEditor extends Model
 
   # Remove any {Fold}s found that intersect the given buffer row.
   destroyFoldsIntersectingBufferRange: (bufferRange) ->
-    @unfoldBufferRow(bufferRange.start.row)
-    @unfoldBufferRow(bufferRange.end.row)
+    @destroyFoldsContainingBufferRange(bufferRange)
 
     for row in [bufferRange.end.row..bufferRange.start.row]
       fold.destroy() for fold in @displayBuffer.foldsStartingAtBufferRow(row)
 
+  destroyFoldsContainingBufferRange: (bufferRange) ->
+    @unfoldBufferRow(bufferRange.start.row)
+    @unfoldBufferRow(bufferRange.end.row)
+
   # {Delegates to: DisplayBuffer.largestFoldContainingBufferRow}
   largestFoldContainingBufferRow: (bufferRow) ->
     @displayBuffer.largestFoldContainingBufferRow(bufferRow)