Tools: Add Radius tool to Grease Pencil toolbar

Icon pending.

release/scripts/startup/bl_ui/space_toolsystem_toolbar.py

@@ -1253,6 +1253,19 @@ class _defs_gpencil_edit:
             draw_settings=draw_settings,
         )
 
+    @ToolDef.from_fn
+    def radius():
+        return dict(
+            text="Radius",
+            description=(
+                "Expand or contract the radius of the selected points"
+            ),
+            icon="ops.gpencil.radius",
+
+            widget=None,
+            keymap=(),
+        )
+
     @ToolDef.from_fn
     def shear():
         return dict(
@@ -1750,9 +1763,12 @@ class VIEW3D_PT_tools_active(ToolSelectPanelHelper, Panel):
             *_tools_transform,
             None,
             _defs_gpencil_edit.extrude,
+            _defs_gpencil_edit.radius,
             _defs_gpencil_edit.bend,
-            _defs_gpencil_edit.shear,
-            _defs_gpencil_edit.tosphere,
+            (
+                _defs_gpencil_edit.shear,
+                _defs_gpencil_edit.tosphere,
+            ),
 
         ],
         'SCULPT_GPENCIL': [