User can save an unnamed (empty) preset and it will be saved to Category/.fxp

[esaruoho]

currently user is able to save an unnamed preset and if it is saved into a new category, the category-folder will get created, and then there'll be a .fxp file in there.

user can then load the preset, too.

[baconpaul]

Well at least you can load it!

[baconpaul]

This one needs #217 resolved first. My plan is to pop an error box saying "patch not saved since name was blank" or some such. But I would love that API to show an error box to user modally in code. (This is not a case where we can throw).

@jsakkine just flagging your attention to this also since I know you are working on the show-message stuff on linux.

Leaving this sit for a bit.

[baconpaul]

This is now fixed.