Request: 12 hour time format for text overlay

[Spokehedz]

Preliminary Docs

I confirm that I have read the CONTRIBUTING guide before opening this issue. YES

I confirm that I have read the FAQ before opening this issue. YES

motionEyeOS Version

I am running motionEyeOS version: 20190911

Board Model

Raspberry Pi Zero W

Camera

I am using the following type of camera: MMAL Camera

My camera model is: vc.ril.camera

Network Connection

My motionEyeOS unit is connected to the network via: WiFi

Peripherals

None

Log Files

None

Could we get the 12-hour '%i' in the text overlay? Or, really, more of the options from the 'standard' set of *nix date text formatting?