added localization for some messages
translation of enroll messages
lms wiki translation
deleted lines for debugging
replaced &hellip; with ...
replaced and changed style of next buttont in dynamic graph courses
added clear button in drag and drop problems
added option for changing enrollment is closed message
fixed coloring of cells in stat table
localization of select problem menu
fixed demo
added option to make available to lock subsctions in linear courses
changed default value for the option
Merge remote-tracking branch 'remotes/origin/gitim/localization_bugs_fixes' into merged_with_master_fixes
Merge remote-tracking branch 'remotes/origin/gitim/cms-localization' into merged_with_master_fixes
localization additions
Merge remote-tracking branch 'origin/gitim/clear-button' into merged_with_master_fixes
Merge remote-tracking branch 'origin/gitim/demo-fix' into merged_with_master_fixes
Merge remote-tracking branch 'origin/gitim/enrollment_is_closed_msg' into merged_with_master_fixes
added changes from branch 'origin/gitim/access-control-to-course'