Braille Viewer: Add a close button on the title bar for use with poin…

…ting devices (#12328)

The Braille Viewer currently presents no close control on its GUI.
It can only be closed with alt+F4 or by means of the dedicated NVDA Tools menu entry.

Description of how this pull request fixes the issue:
Add a standard close button on the title bar of the Braille Viewer dialog.

source/brailleViewer/brailleViewerGui.py

@@ -1,5 +1,5 @@
 # A part of NonVisual Desktop Access (NVDA)
-# Copyright (C) 2014-2019 NV Access Limited
+# Copyright (C) 2014-2021 NV Access Limited, Accessolutions, Julien Cochuyt
 # This file is covered by the GNU General Public License.
 # See the file COPYING for more details.
 import enum
@@ -280,7 +280,7 @@ def __init__(self, numCells, onDestroyed):
 			gui.mainFrame,
 			title=self._title,
 			pos=dialogPos,
-			style=wx.CAPTION | wx.STAY_ON_TOP
+			style=wx.CAPTION | wx.CLOSE_BOX | wx.STAY_ON_TOP
 		)
 		self.Bind(wx.EVT_CLOSE, self._onClose)
 		self.Bind(wx.EVT_WINDOW_DESTROY, self._onDestroy)

user_docs/en/changes.t2t

@@ -26,6 +26,7 @@ What's New in NVDA
 - Support for Adobe Flash content has been removed from NVDA due to the use of Flash being actively discouraged by Adobe. (#11131)
 - NVDA will exit even with windows still open, the exit process now closes all NVDA windows and dialogs (#1740)
 - The Speech Viewer can now be closed with `alt+F4` and has a standard close button for easier interaction with users of pointing devices. (#12330)
+- The Braille Viewer now has a standard close button for easier interaction with users of pointing devices. (#12328)
 
 
 == Bug Fixes ==