Fixes #3517 : Now handle exception when the lock file is already taken.
Fixes  #3639 : correct disable/enable css buttons
Fixes #3612 : Clearer logs when dynamic updates
Merge pull request #230 from VinceMacBuche/bug_3639/search_form_buttons_stay_disabled

Fixes  #3639 : correct disable/enable css buttons
Merge pull request #228 from VinceMacBuche/bug_3517/Handle_error_node_deletion

Fixes #3517 : Now handle exception when the lock file is already taken.
Merge pull request #231 from VinceMacBuche/bug_3612/dyn_update_log

Fixes #3612 : Clearer logs when dynamic updates