LimeSurvey 6.16.13 build 260316

-Fixed issue: Adjusted panel cards, import survey and import user, toolbuttons for sidebar (a11y) (#4437) (Anblik Audit Team)
-Fixed issue: Added and adjusted missing tags and roles on question summary page (a11y) (#4435) (Anblik Audit Team)
-Fixed issue #LE-633: Prevent type error when quota language settings are missing (#4758) (haythem chibani)
-Fixed issue #LE-534: Switching access mode in classic editor does not get updated in new editor (#4761) (haythem chibani)
-Fixed issue #20456: Editing source syntax highlighting missing (Carsten Schmitz)
-Fixed issue #20455: The 404 error page for non-existent surveys displays raw HTML entities (Carsten Schmitz)
-Fixed issue #20449: Unable to edit account settings when using Hiligaynon (Carsten Schmitz)
#Updated translation: Polish by elissa
#Updated translation: Polish (Informal) by elissa
#Updated translation: Italian (Informal) by c_schmitz
#Updated translation: German by c_schmitz
#Updated translation: German by actxcellence, c_schmitz
#Updated translation: Finnish by Jmantysalo
#Updated translation: Dutch by Han
#Updated translation: Dutch (Informal) by Han