Display the virtual keyboard close to its taskbar icon in Windows Camouflage mode

The place where Florence is displayed is well adjusted to stick to the top panel in non-camouflage mode: this way, when one toggles it on, it’s readily available, close to where the mouse pointer is. In Windows Camouflage mode, the place where it’s displayed (that is, the same, wrt. the entire screen) feels awkward, and is quite far from the place where the mouse cursor that toggled it on is.

Presumably, /usr/local/bin/tails-activate-win8-theme should change the Florence settings to fix that.

Related issues

• Related to #7377 (closed)

Original created by @intrigeri on 7389 (Redmine)