Everywhere: It's now "Foobar", not "FooBar", and not "foo bar"

I hereby declare these to be full nouns that we don't split,
neither by space, nor by underscore:

- Breadcrumbbar
- Coolbar
- Menubar
- Progressbar
- Scrollbar
- Statusbar
- Taskbar
- Toolbar

This patch makes everything consistent by replacing every other variant
of these with the proper one. :^)

Userland/Applications/FontEditor/FontEditorWindow.gml

@@ -3,10 +3,10 @@
     layout: @GUI::VerticalBoxLayout {
     }
 
-    @GUI::ToolBarContainer {
+    @GUI::ToolbarContainer {
         name: "toolbar_container"
 
-        @GUI::ToolBar {
+        @GUI::Toolbar {
             name: "toolbar"
         }
     }
@@ -205,7 +205,7 @@
         }
     }
 
-    @GUI::StatusBar {
-        name: "status_bar"
+    @GUI::Statusbar {
+        name: "statusbar"
     }
 }