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/FontEditor.h

@@ -42,7 +42,7 @@ public:
     const String& path() { return m_path; }
     const Gfx::BitmapFont& edited_font() { return *m_edited_font; }
     void initialize(const String& path, RefPtr<Gfx::BitmapFont>&&);
-    void initialize_menubar(GUI::MenuBar&);
+    void initialize_menubar(GUI::Menubar&);
 
     bool is_showing_font_metadata() { return m_font_metadata; }
     void set_show_font_metadata(bool b);