I always should make same filter combinations (for example, ‘text and transparent’ and ‘text, text and text’) for each projects.
So I tried to save preset these combinations but it does not.
Of course, I can save it but I could not find combinations after loading my preset.
There is just one filter.
I think we already can save/load multiple filters with .mlt than we can save/load multiple filter combination by using preset.
I checked .mlt and preset files and found preset files are simple text type.
I think we need huge effort for this functionality because
we need convert to all preset files to xml and re-create parser maybe.
If you have plan about multiple filters control, I want to help you anythings.