Add missing shift-backspace and shift-delete bindings

keymaps/darwin.cson

@@ -54,6 +54,7 @@
   'shift-left': 'core:select-left'
   'shift-right': 'core:select-right'
   'delete': 'core:delete'
+  'shift-delete': 'core:delete'
   'pageup': 'core:page-up'
   'pagedown': 'core:page-down'
   'backspace': 'core:backspace'

keymaps/linux.cson

@@ -34,9 +34,11 @@
   'shift-left': 'core:select-left'
   'shift-right': 'core:select-right'
   'delete': 'core:delete'
+  'shift-delete': 'core:delete'
   'pageup': 'core:page-up'
   'pagedown': 'core:page-down'
   'backspace': 'core:backspace'
+  'shift-backspace': 'core:backspace'
   'ctrl-tab': 'pane:show-next-item'
   'ctrl-shift-tab': 'pane:show-previous-item'
   'ctrl-shift-up': 'core:move-up'

keymaps/win32.cson

@@ -36,6 +36,7 @@
   'shift-left': 'core:select-left'
   'shift-right': 'core:select-right'
   'delete': 'core:delete'
+  'shift-delete': 'core:delete'
   'pageup': 'core:page-up'
   'pagedown': 'core:page-down'
   'backspace': 'core:backspace'