Merge pull request openstenoproject#929 from benoit-pierre/fix_926

gui_qt: fix possible crash on Linux

Merge pull request openstenoproject#872 from benoit-pierre/tweak_blac…

…kbox_assertion_message

utils: tweak blackbox test assertion message

bump development version

Merge pull request openstenoproject#850 from benoit-pierre/update_plu…

…gins_manager

plugins: update plover-plugins-manager to latest version

Merge pull request openstenoproject#828 from morinted/issue_400

Update dictionary with feedback from issue 400

bump development version

bump development version