e:cue reimport: handle multiple modes

[fxedel]

Problem

e:cue doesn't support modes, so a fixture with different modes is exported as multiple fixtures with "(mode)" appended to the fixture name. So when reimporting a library with fixtures of multiple types, it results in multiple fixtures (and not the more cleaner version of one fixture with modes).

Possible solution

When exporting, add xml attributes for full fixture name and full mode name => will be ignored by e:cue (hopefully), but can be used when reimporting.

[FloEdelmann]

First, it's named e:cue, not eque ;)

I think it would be better to store a named field in the comment, as e:cue might delete the custom attributes when editing with e:cue's fixture editor (or maybe doesn't like it at all). But anyway, this is not an important issue, as exporting and reimporting is not a likely use case.

EDIT: Another idea: Combine multiple devices into different modes when their names differ only in braces like Name (3ch) and Name (5ch).