DropdownInput preview support and ColorButton history improvements (#1598)

* DropdownInput support preview

* fix typo and rm logs

* Add previewable flag

* fix cr typos

* Improve color button history

* rename

* update dropdown preview behaviour

* Color picker preset color

* Another way to handle blend mode preview

* Apply suggestions from code review

* Use on_commit instead of on_update for some dropdowns

* Debugging progress

* add debug

* active not equal to highlight in some cases

* rm logs

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/tool/tool_messages/brush_tool.rs

@@ -165,7 +165,7 @@ impl LayoutHolder for BrushTool {
 					.map(|blend_mode| {
 						MenuListEntry::new(format!("{blend_mode:?}"))
 							.label(blend_mode.to_string())
-							.on_update(|_| BrushToolMessage::UpdateOptions(BrushToolMessageOptionsUpdate::BlendMode(*blend_mode)).into())
+							.on_commit(|_| BrushToolMessage::UpdateOptions(BrushToolMessageOptionsUpdate::BlendMode(*blend_mode)).into())
 					})
 					.collect()
 			})

editor/src/messages/tool/tool_messages/select_tool.rs

@@ -98,7 +98,7 @@ impl SelectTool {
 			.map(|mode| {
 				MenuListEntry::new(format!("{mode:?}"))
 					.label(mode.to_string())
-					.on_update(move |_| SelectToolMessage::SelectOptions(SelectOptionsUpdate::NestedSelectionBehavior(*mode)).into())
+					.on_commit(move |_| SelectToolMessage::SelectOptions(SelectOptionsUpdate::NestedSelectionBehavior(*mode)).into())
 			})
 			.collect();