Prepare release and bump version numbers to 1.8.10.0

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Use TortoiseGit.common-staticlib.props

This also fixes that Utils.lib was created in $OutDir.

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Rebase: Warn on continue if working tree isn't clean

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Allow to commit to super project after push in submodule

Signed-off-by: Sven Strickroth <email@cs-ware.de>