build: update gitignore
main: Parent chooser dialogs with main window
VUMeter: Make the VU meter cooler
VUmeter: Back port 9310781a683d1475c1c0ba2b9d1e3dea6866f22c to gst 0.1

Back port 9310781a683d1475c1c0ba2b9d1e3dea6866f22c
VUMeter: Make the VU meter cooler
to gstreamer 0.1