When the workspace changes use the passed in workspace screen mode

...instead of the current workspace screen mode that we are switching from.
Fixes #9415
Also don't ignore the returned the status code when updating the screen mode.

src/preferences/screen/ScreenWindow.cpp

@@ -802,17 +802,26 @@ ScreenWindow::_UpdateControls()
 /*! Reflect active mode in chosen settings */
 void
 ScreenWindow::_UpdateActiveMode()
+{
+	_UpdateActiveMode(current_workspace());
+}
+
+
+void
+ScreenWindow::_UpdateActiveMode(int32 workspace)
 {
 	// Usually, this function gets called after a mode
 	// has been set manually; still, as the graphics driver
 	// is free to fiddle with mode passed, we better ask
 	// what kind of mode we actually got
-	fScreenMode.Get(fActive);
+	if (fScreenMode.Get(fActive, workspace) == B_OK) {
 		fSelected = fActive;
 
 		_UpdateMonitor();
+		_BuildSupportedColorSpaces();
 		_UpdateControls();
 	}
+}
 
 
 void
@@ -851,12 +860,13 @@ ScreenWindow::ScreenChanged(BRect frame, color_space mode)
 void
 ScreenWindow::WorkspaceActivated(int32 workspace, bool state)
 {
-	fScreenMode.GetOriginalMode(fOriginal, workspace);
+	if (fScreenMode.GetOriginalMode(fOriginal, workspace) == B_OK) {
-	_UpdateActiveMode();
+		_UpdateActiveMode(workspace);
 
 		BMessage message(UPDATE_DESKTOP_COLOR_MSG);
 		PostMessage(&message, fMonitorView);
 	}
+}
 
 
 void

src/preferences/screen/ScreenWindow.h

@@ -50,6 +50,7 @@ private:
 			void			_CheckRefreshMenu();
 
 			void			_UpdateActiveMode();
+			void			_UpdateActiveMode(int32 workspace);
 			void			_UpdateWorkspaceButtons();
 			void			_UpdateRefreshControl();
 			void			_UpdateMonitorView();