Shift plan improvements

In the My Attendance app, you can now see the occupancy of individual shifts, and shifts that are occupied are displayed in gray. It is thus clear at first glance which shift is still free and which is already full.

In addition, icons appear in the main Web application in the Shift Schedule agenda to indicate that the shift schedule has been manually modified. So, for example, if someone has an even-odd week shift schedule and you operatively change their shift, that day will be marked with an icon indicating an adjustment.