Make sure we take icons from Material Design Icon pack prior v3.0.
Originally they were published under GPL friendly CC BY 4.0 license,
but later switched to Apache 2.0 license.
Here's mapping of our icons to MD icon pack:
defaults.png -> action/ic_settings.png
georeference.png -> communication/ic_location.png
graph.png -> action/ic_timeline.png
Those icons were not modified, just renamed them.
