Fix crash after closing auto subtitles dialog, add config button to speech widgets opening the config page

Only list speech model folder if it contains an expected config file, and disable/enable speech features when system config is updated

Fixes #938

Related to #936

Related to #935

Fixes #934

FIxes #936

Related to #929

Fixes #929

(cherry picked from commit d3db1f2d)

Fixes !173

Fix rendering uses wrong locale, resulting in broken slowmotion in render and possibly other issues on some locales

after removal of old resource file

Related to #928

Fixes #928

Fixes #926