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/Libraries/LibGUI/EmojiInputDialog.cpp

@@ -85,7 +85,7 @@ EmojiInputDialog::EmojiInputDialog(Window* parent_window)
                 auto emoji_text = builder.to_string();
                 auto& button = horizontal_container.add<Button>(emoji_text);
                 button.set_min_size(16, 16);
-                button.set_button_style(Gfx::ButtonStyle::CoolBar);
+                button.set_button_style(Gfx::ButtonStyle::Coolbar);
                 button.on_click = [this, button = &button](auto) {
                     m_selected_emoji_text = button->text();
                     done(ExecOK);