Settings LightSettingsDialog: update led on text change

Change-Id: I135f37829b9b4fb2166afac9d9531b76a62f3ef7
add option to force high-end graphics on low memory devices

Change-Id: I34e0d7381615485b58385abed743e01f7272772d
Merge remote-tracking branch 'upstream/kk' into kk