Layout system implementation and applied to tool options bar (#499)

* initial layout system with tool options

* cargo fmt

* cargo fmt again

* document bar defined on the backend

* cargo fmt

* removed RC<RefCell>

* cargo fmt

* - fix increment behavior
- removed hashmap from layout message handler
- removed no op message from layoutMessage

* cargo fmt

* only send documentBar when zoom or rotation is updated

* ctrl-0 changes zoom properly

* Code review changes

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

editor/src/viewport_tools/tool_message.rs

@@ -1,5 +1,4 @@
 use super::tool::ToolType;
-use super::tool_options::ToolOptions;
 use crate::message_prelude::*;
 
 use graphene::color::Color;
@@ -92,10 +91,6 @@ pub enum ToolMessage {
 	SelectSecondaryColor {
 		color: Color,
 	},
-	SetToolOptions {
-		tool_type: ToolType,
-		tool_options: ToolOptions,
-	},
 	SwapColors,
 	UpdateCursor,
 	UpdateHints,