Debugger: Switch editor tooltips on by default

Makes them easier discoverable and seems what at least VS people
expect.

Change-Id: Iebf61f4760da6077495a97e6333cc9e9d7816706
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Doc: new Git commands.

Update screenshots.

Change-Id: I02fad85ba02bb8303e94202bc3e030d3767740cd
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>