ToolSystem: increase the inset tool size

The inset tool requires moving the cursor towards the center of the
selection, making it nearly impossible to use the inset tool
when the view was aligned with the vertical handle.

Use custom settings for VIEW3D_GGT_tool_generic_handle_free
to make it draw hollow, as large as the scale tool.

Resolves T87991.

release/scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -824,7 +824,11 @@ class _defs_edit_mesh:
             idname="builtin.inset_faces",
             label="Inset Faces",
             icon="ops.mesh.inset",
-            widget="VIEW3D_GGT_tool_generic_handle_normal",
+            widget="VIEW3D_GGT_tool_generic_handle_free",
+            widget_properties=[
+                ("radius", 75.0),
+                ("backdrop_fill_alpha", 0.0),
+            ],
             keymap=(),
             draw_settings=draw_settings,
         )