Fix window restoration bugs (#9358)

- [x] fixes https://github.com/zed-industries/zed/issues/9349
- [x] fixes https://github.com/zed-industries/zed/issues/4656
- [x] fixes https://github.com/zed-industries/zed/issues/8345

Release Notes:

- TODO

crates/workspace/src/persistence/model.rs

@@ -70,6 +70,7 @@ pub(crate) struct SerializedWorkspace {
     pub(crate) location: WorkspaceLocation,
     pub(crate) center_group: SerializedPaneGroup,
     pub(crate) bounds: Option<Bounds<GlobalPixels>>,
+    pub(crate) fullscreen: bool,
     pub(crate) display: Option<Uuid>,
     pub(crate) docks: DockStructure,
 }