[cv6] Core 1.2.0 RC 3

Small bug fixes
additional new phrases

You only need to update, if a depending AddOn requires this.

My Core AddOn now as first with 2.3 compatibility, and requires also XF 2.3

Don't update until all my AddOns that you use, have the XF 2.3 compatible version.

Replaces XF Core FontAwesome Input fields with my Preview Version.

• Messages Template for Admin

Some more shared functions added to the core. (indexale trait and template macros).

No need to upgrade, if no AddOn requires the upgrade of the core. The next upcoming index will need this version.