A.F....... [ZBX-18470] fixed unusefull timezone formatting; replaced comboboxes by CSelect elements for timezone selection
Merge in ZBX/zabbix from feature/ZBX-18470-5.1 to master
* commit '1c02f11787708fa67c9237103b8885c499882608':
..F....... [ZBX-18470] fixed label of default timezone option when no valid timezone is specified
..F....... [ZBX-18470] fixed minor coding style issue
..F....... [ZBX-18470] fixed 'reset default'
..F....... [ZBX-18470] added focusable element IDs
..F....... [ZBX-18470] reverted unneeded changes
A.F....... [ZBX-18470] fixed unusefull timezone formatting; replaced comboboxes by CSelect elements for timezone selection
