v1.2.0 Release

This is the release of Wegue v1.2.0 and herewith the first version of the v1.2.x series.

The release brings a few new features and a bug fix.

Many thanks to all contributors!

List of all merged Pull Requests:

• @chrismayer: Set version to 1.2.0 (#318)
• @chrismayer: Extend 'sidebar-toggle' event to force open state (#317)
• @chrismayer: Configure "X" button to close module windows (#316)
• @chrismayer: Fix badge for github workflow in README (#315)
• @fschmenger: Resizable sidebar (#313)