Dynamic Iqama time aligned to 15 mins

Most masjids in the U.S. have the Iqama time set to a 15 min mark so its easy for mussalih's to remember the time.

To make this possible, we can have an optional checkbox when checked sets the Iqama to the next 15 mins.

Example: Adhan is 5:35am, Iqama is set to 15 min after which means Iqama should be called at 5:50am. With the new feature, when the box is checked, Iqama would be set at 6am.

This will be dynamic and we don't have to upload a manual timetable