Disable the Brush tool by default and add it to preferences under experimental

editor/src/messages/preferences/preferences_message.rs

@@ -13,6 +13,7 @@ pub enum PreferencesMessage {
 	UseVello { use_vello: bool },
 	SelectionMode { selection_mode: SelectionMode },
 	VectorMeshes { enabled: bool },
+	BrushTool { enabled: bool },
 	ModifyLayout { zoom_with_scroll: bool },
 	GraphWireStyle { style: GraphWireStyle },
 	ViewportZoomWheelRate { rate: f64 },

editor/src/messages/preferences/preferences_message_handler.rs

@@ -11,6 +11,7 @@ pub struct PreferencesMessageHandler {
 	pub zoom_with_scroll: bool,
 	pub use_vello: bool,
 	pub vector_meshes: bool,
+	pub brush_tool: bool,
 	pub graph_wire_style: GraphWireStyle,
 	pub viewport_zoom_wheel_rate: f64,
 }
@@ -38,6 +39,7 @@ impl Default for PreferencesMessageHandler {
 			zoom_with_scroll: matches!(MappingVariant::default(), MappingVariant::ZoomWithScroll),
 			use_vello: EditorPreferences::default().use_vello,
 			vector_meshes: false,
+			brush_tool: false,
 			graph_wire_style: GraphWireStyle::default(),
 			viewport_zoom_wheel_rate: VIEWPORT_ZOOM_WHEEL_RATE,
 		}
@@ -76,6 +78,10 @@ impl MessageHandler<PreferencesMessage, ()> for PreferencesMessageHandler {
 			PreferencesMessage::VectorMeshes { enabled } => {
 				self.vector_meshes = enabled;
 			}
+			PreferencesMessage::BrushTool { enabled } => {
+				self.brush_tool = enabled;
+				responses.add(ToolMessage::RefreshToolShelf);
+			}
 			PreferencesMessage::ModifyLayout { zoom_with_scroll } => {
 				self.zoom_with_scroll = zoom_with_scroll;