Keymap: continued testing/development

After testing in the studio and extending the event system for
drag events, we've agreed on adjustments to the new keymap,
see: T55162

- Tab: Edit-mode toggle.
- Tab + Cursor Drag: mode switching pie menu.
- Accent/Grave: for 3D view pie menu.
- F3: Search
- 1..3, Shift-1..3: Edit mesh vertex/edge/face toggle.

Other minor changes were made, however they aren't part of the design.

- Ctrl-Shift-S: Image editor Save-As (was F3)
- Ctrl-Alt-R: Repeat history (was F3)

release/scripts/startup/bl_ui/space_view3d.py

@@ -3394,6 +3394,28 @@ class VIEW3D_MT_edit_gpencil_interpolate(Menu):
         layout.operator("gpencil.interpolate_sequence", text="Sequence")
 
 
+class VIEW3D_PIE_object_mode(Menu):
+    bl_label = "Mode"
+
+    def draw(self, context):
+        layout = self.layout
+
+        pie = layout.menu_pie()
+        pie.operator_enum("OBJECT_OT_mode_set", "mode")
+
+
+class VIEW3D_PIE_view(Menu):
+    bl_label = "View"
+    bl_idname = "VIEW3D_PIE_view"
+
+    def draw(self, context):
+        layout = self.layout
+
+        pie = layout.menu_pie()
+        pie.operator_enum("VIEW3D_OT_viewnumpad", "type")
+        pie.operator("view3d.view_selected", text="View Selected", icon='ZOOM_SELECTED')
+
+
 # ********** Panel **********
 
 
@@ -4009,6 +4031,8 @@ classes = (
     VIEW3D_MT_edit_armature_delete,
     VIEW3D_MT_edit_gpencil_transform,
     VIEW3D_MT_edit_gpencil_interpolate,
+    VIEW3D_PIE_object_mode,
+    VIEW3D_PIE_view,
     VIEW3D_PT_grease_pencil,
     VIEW3D_PT_grease_pencil_palettecolor,
     VIEW3D_PT_view3d_properties,