Use PyInitializeEx in order to skip signal handler registration

This small fix prevents the Python library to overrule the signal handling of Remmina.

Issue: 2729

added bug label

requested review from @antenore

assigned to @antenore and @ToolsDevler

changed the description

mentioned in issue #2729 (closed)

approved this merge request

:-O really!? I'm sorry I didn't see it myself

No worries. It's not really intuitive.

merged

mentioned in commit b6c18226

mentioned in commit 32cd9db0

mentioned in merge request !2408 (merged)