+.IM - new "time" sub-module

[Pinacolada64]

I am working on an idea to add a sub-module to IM. Moving the "Remote Time Editor" into its own sub-module will knock a few blocks off IM and add two features to the `Time Set" menu:

• Set prime time start/end times, toggle prime time
• Change clock set method/external device number

Maybe the menu item could be renamed to "Time Functions" or something.

[x-tec2017]

This is a good idea and something that needs to be done.

[Pinacolada64]

Finally making a start at this. Moved Remote Time Editor to +/IM.time, adding Prime Time edit functions.