OpenPype style in modules

[iLLiCiTiT]

Changes

• Ftrack module
  • login widget is using openpype style
  • ftrack url is label instead of input (as user can't change the url)
• Clockify module
  • credentials widget use openpype style
  • fixed bug in clockify api
  • simplified a little bit code of widgets
  • ok and cancel buttons have same width
• Muster module
  • credentials widget use openpype style
  • ok and cancel buttons have same width
• Timers manager module
  • message box (about stopping timers) is using openpype style