[BUG] Need camera-model specific overlay configuration files

[EricClaeys]

There are currently two overlay configuration files - one for ZWO cameras and the other for RPi cameras.
There should be a different file for each Camera Model so when users switch models (which usually have different resolutions) fields can be placed in the correct place.

Ideally when a user switches to a new Camera Model that doesn't yet have a configuration file, one would be created based on the prior Camera Model if it exists, or else on the generic Camera Type configuration file. Either way, any field in the new file that is outside the image size should be moved into the image.

The above would happen during installation if a new Camera Model us detected. A function or utility script that is called from install.sh or from makeChanges.sh should check for the correct file and create it if needed.