Merge pull request #6791
d0321a4 [doc] trivial: fix markdown syntax in qa/rpc-tests/README.md (MarcoFalke)
60a8b70 [doc] trivial: developer-notes.md covers more than just coding standards (MarcoFalke)
3507992 [trivial] Make optimize-pngs.py also cover share/pixmaps (MarcoFalke)
8a320c7 [trivial] Remove obsolete share/qt/make_windows_icon.sh (MarcoFalke)