Note that it will be eventually fixed and won’t work anymore (I’ll consider a changeBackground() function or similar) and the change won’t get saved immediately - but might accidentally get saved afterwards if you manually do it.
changed the code to: <button class="dashboard-link" ng-click="sendCmd(config.habpanel_item, config.dashboard_name); $root.settings.background_image = config.bg_img">
and added a new setting with id bg_img for image address (e.g. /static/bg.jpg)
Now Im able to change the dashboards with this link and the the background also changes.
Lets start with my HABpanel floorplan!