BF: Implement auto_set feature for Qt's enum editor
BF: autoset handler for Qt's EnumEditor when editor is destroyed
BF: Qt's SetEditor should remove any selected items that aren't found in the enumeration when it changes
BF: Allow setting multiple selections in Qt's TreeEditor and replacing the root node of the tree.
Merge pull request #20 from pankajp/master

Qt FileEditor custom (tree) view: Hide filtered out files instead of only disabling them
BF: Use QItemSelection to set multiple selections in Qt tree editor
Merge pull request #19 from nmichaud/master

Minor bugfixes implemented while using TraitsUI with the Qt4 backend.
BUG: Make update_object safe in Qt-backend, simple-style FileEditor.

Closes gh-18.
FileEditor.dclick: set the event to the double clicked path instead of True
This is needed to get the double clicked (activated) path since the
selected path is not yet set to the double clicked path (noted on qt).
Merge pull request #21 from pankajp/file_editor_dclick_sel

FileEditor.dclick: set the event to the double clicked path instead of True
BUG: qt FileEditor did not show horizontal scrollbar even when needed.

The change is a qt quirk needed to add horizontal scrollbar to a single
column tree.
Merge pull request #25 from pankajp/file_editor_horiz_scroll

BUG: qt FileEditor did not show horizontal scrollbar even when needed.
Tested Windows & OSX
BUG: TreeEditor text wrap: incorrect wrrapping
sizeHint() should return the size required by the label, which is
dependent on the width available, which is different for each item
due to the nested tree structure. However the option.rect argument
available to the sizeHint() is invalid (width=-1) so as a hack
sizeHintChanged is emitted in paint() and the size of drawn text is
returned, as paint() gets a valid option.rect argument.
ENH: FileEditor: (Qt) make Enter key press perform dclick action.
This matches the behavior on wx, which is intuitive.
ENH: Change "Browse..." text for file editor to an icon.
ENH: Add a tool-tip to items in the TreeView of file editor.
Merge pull request #30 from pankajp/file_editor-enter-dclick

ENH: FileEditor: (Qt) make Enter key press perform dclick action.
Merge pull request #29 from punchagan/treeView_toolTip

ENH: Add a tool-tip to items in the TreeView of file editor.
Merge pull request #27 from punchagan/browse_icon

ENH: Change "Browse..." text for file editor to an icon.
Merge pull request #28 from pankajp/tree_editor_wrap_fix

BUG: TreeEditor text wrap: incorrect wrrapping