Merge topic 'fix_backspace_cocoa_keysym' into release

0a6eb5d5 Doc: Adding .md file
55d13873 Cocoa: Fix BackSpace keysym as it was incorrect

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Acked-by: Sean McBride <sean@rogue-research.com>
Reviewed-by: David Gobbi <david.gobbi@gmail.com>
Merge-request: !11738

Documentation/release/dev/cocoa-backspace-keysym.md

+### Fixed Cocoa incorrect KeySym
+
+Pressing backspace on Cocoa (macOS) would generate the keysym `Backspace`, which
+was inconsistent with other OSes. It has been fixed to generate `BackSpace` as expected.

Rendering/OpenGL2/vtkCocoaGLView.mm

@@ -201,7 +201,7 @@ static const char* MacKeyCodeToKeySymTable[128] = {
   nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, 
   nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, 
   nullptr, nullptr, nullptr, nullptr, "Return",nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, 
-  "Tab", nullptr, nullptr, "Backspace", nullptr, "Escape", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, 
+  "Tab", nullptr, nullptr, "BackSpace", nullptr, "Escape", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, 
   nullptr, "period", nullptr, "asterisk", nullptr, "plus", nullptr, "Clear", nullptr, nullptr, nullptr, "slash", "KP_Enter", nullptr, "minus", nullptr, 
   nullptr, nullptr, "KP_0", "KP_1", "KP_2", "KP_3", "KP_4", "KP_5", "KP_6", "KP_7", nullptr, "KP_8", "KP_9", nullptr, nullptr, nullptr, 
   "F5", "F6", "F7", "F3", "F8", nullptr, nullptr, nullptr, nullptr, "Snapshot", nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,