Opened applet alternatives for TM in auto hidden panel, alternatives showed up and kept panel open. Panel auto-hid again once closed. Before the alternative dialog wouldn't even show up.
You get a brief flicker of the panel starting to hide while the QML is being processed but it's an improvement over the status quo in any way.
I tried to figure out why Dialog behaves weird (if I didn't set visualParent to `alternativesHelper.applet` which is in an auto-hidden panel it worked) but I got lost in there. I know that the dialog's position was properly determined but then somewhere it got confused.
Also verified that when I opened Alternatives for multipple applets simultaneously, the panel would only hide again after I closed the last one.
Some sneaky RAII in side ;)