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.
QCheckBox::toggled and other similar signals are used to save changes and to update widget status (such as enabled).. OnConfigChanged needs to load new values and trigger widget updates, but the new value shouldn't trigger a save. A save is unnecessary (the config has the correct values and the UI is being updated to those values) and it'd trigger another ConfigChanged signal. This commit blocks the save without blocking the signal entirely.
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.
