Fix two bugs with bold and italic labels when a non-Base config layer is
active.
First, when constructing a ConfigControl the label wouldn't be
bolded until the next time a ConfigChanged signal was received. This
would happen if the user started a game before opening a config window
for the first time since starting Dolphin.
Second, ConfigRadioInt would bold/italicize every radio button for that
setting instead of just the selected radio button.
Renames the IsConfigLocal function to ShouldLabelBeBold, since the
former name was inaccurate if m_layer wasn't the local layer.
Creates a layer outside the game config layer system and passes it to the created gfx widows, so as to not interfere with the global config system.
Supports multiple game properties being open at once.
Supports editing while a game is playing, but the options only save and update the active game when the window is closed.
Right-clicking will remove a property from the game ini.
GraphicsRadioInt is used by the panes in the Graphics config window to
create radio buttons that change their associated config setting, and
update their own state when something else changes the config setting.
Despite its current name nothing about this class is particular to the
Graphics window, so renaming it to ConfigRadioInt better reflects its
purpose. This should also make it less confusing when ConfigRadioInts
are added to other config panes.
