conf-tweaks: Rename from pmos-tweaks + Rename page-builder to preferences-page
The name is being changed for two reasons:
- While this scheme originated in postmarketOS, it is not strictly related or dependent on postmarketOS.
- The name postmarketOS is due to be changed soon, but actually changing it will take a while. Waiting for a new name before landing this doesn't make much sense.
Now that this file contains a class called PreferencesPage, it makes more sense for it to be named after that.
Signed-off-by: Stefan Hansson newbyte@postmarketos.org