Monitor development of screen keyboard in GNOME

Originally created by @sajolida on #8444 (Redmine)

Good screen keyboard support is required for Tails on handheld devices and touchscreen.

GNOME is working on an integrate screen keyboard:

We should monitor their progress and help them focus on what matters, especially about:

The on-screen keyboard layout does not reflect the physical keyboard layout except for very few languages (but accented and other special chars can be input). See #8281 (comment 88247) for the current state of things, and #8281 (comment 88288) for WIP in this area. Actually there are two cases:
- using the on-screen keyboard as a counter-measure against hardware keyloggers: then this is a serious problem as one has to context-switch between the layout of the physical keyboard and the layout of the on-screen keyboard;
- using the on-screen keyboard for universal access reasons: in this case, one will “simply” get used to the QWERTY layout, and no context switch is involved, so it’s OK-ish (except for people who switch between and other operating systems).

Edited May 15, 2020 by sajolida

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