Required skills: Python

Difficulty: Easy

openage currently stores information about a game edition or expansion inside an Enum, e.g. media paths, support status, etc. We should store this information in an auxiliary file instead, similar to #1312. That would make updating and correcting game information easier as we no longer have to replace chunks of code.

The recommended appro

Is your feature request related to a problem? Please describe.

When editing an attribute using set/edit, if the attribute in question is unset or otherwise None, the string "None" is prepended to the buffer.

----------Line Editor [object/name]-----------------------------------------
01| None
----------[l:01 w:001 c:0004]------------(:h for help)------------------------

scale= is not a constructor option for Layer.add_label().

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Enhancements and bug reports are appreciated!