On-screen-keyboard has many bugs in Tails 4.14+

With an English keyboard layout, only ascii characters work, so many of the characters on the =/< symbol page does not work, like •√Π.

With German it works mostly as English, but unlike English e.g. °™®© works and ^ doesn't.

With Hindi, in addition the problems for English above, not even a-z works, and several characters on the ?123 symbol page does not work, like "':; (and interestingly 4 doesn't work, but all other digits are fine).

With Indonesian the problems are similar to those for Hindi above, but "':; works and ?,% doesn't.

Wow, it's really messy!

All this works fine in Tails 4.13, but affects 4.14.

At least on branches that run fragile tests and based on the testing branch (pre-4.20) we also see "the screen keyboard works in Thunderbird" fail in Chinese.