Better names on duplicate auras

Instead of simply appending a " 2" on each duplication, which
leads to aura names like "xxx 2 2 2 2" on repeated duplicates,
increment the number if there is a number, leading to the much
nicer name "xxx 5"
Added a always condition trigger that's always true

Trivial to do and has some uses, e.g. for showing artwork or for
temporarily replacing one trigger by a always true trigger.
Font Flags: Remove monochrome option

Found out while testing a realted change that this is a widely known
issue. Google finds several bug reports that indicate that this affects
many addons.
Font Flags: Add Monochrome Outline and Monochrome Thick Outline
Spark more options: Rotation and Mirror
Remove spark textures that look bad

With the rotation option the standard beam textures are useable,
and good enough for a start. So remove my rather medicore textures.

The community will hopefully provide better graphics once the
feature is released.