Transform: support navigation while transforming in 3D view

Implements a new option in keymap settings:
- "Navigate during Transform"

Note that with the option enabled, the keymap changes as follows:

|Modal Map (Blender):| Conflict: | Current: | New:
|---|---|---|---
| Increase Proportional Influence | VIEW3D_OT_zoom | Wheel Down | Alt Wheel Down
| Decrease Proportional Influence | VIEW3D_OT_zoom | Wheel Up | Alt Wheel Up
| Adjust Proportional Influence | VIEW3D_OT_rotate | Mouse/Trackpad Pan | Alt Mouse/Trackpad Pan
| Increase Max AutoIK Chain Length | VIEW3D_OT_zoom | Wheel Down | Alt Wheel Down
| Decrease Max AutoIK Chain Length | VIEW3D_OT_zoom | Wheel Up | Alt Wheel Up
| Automatic Constraint | VIEW3D_OT_rotate | Middle Mouse | Alt Middle Mouse
| Automatic Constraint Plane | VIEW3D_OT_move | Shift Middle Mouse | Shift Alt Middle Mouse

Design Task: #106008
Pull Request: https://projects.blender.org/blender/blender/pulls/105764

scripts/startup/bl_ui/space_view3d.py

@@ -1038,10 +1038,22 @@ class VIEW3D_MT_transform_base:
     # TODO: get rid of the custom text strings?
     def draw(self, context):
         layout = self.layout
+        allow_navigation = getattr(
+            context.window_manager.keyconfigs.active.preferences,
+            "use_transform_navigation",
+            False)
 
-        layout.operator("transform.translate")
-        layout.operator("transform.rotate")
-        layout.operator("transform.resize", text="Scale")
+        props = layout.operator("transform.translate")
+        props.release_confirm = False
+        props.allow_navigation = allow_navigation
+
+        props = layout.operator("transform.rotate")
+        props.release_confirm = False
+        props.allow_navigation = allow_navigation
+
+        props = layout.operator("transform.resize", text="Scale")
+        props.release_confirm = False
+        props.allow_navigation = allow_navigation
 
         layout.separator()