config: fix gradient rgb(a) parsing with spaces (for real this time)

[PaideiaDilemma]

Closes #622
I missed that Hyprland does not support spaces for rgb(a) either and somehow i thought i broke it. So it is broken since gradients were added.

Not the best fix, but the simplest. Should I add this in Hyprland as well?

[vaxerski]

this wont accept 1, 2 why not just trim()?

[PaideiaDilemma]

We can do that, but i need to seperate individual gadient colors differently (currently split by spaces) and then change configStringToInt to support it.
Or have an extra loop to parse out the spaces only in between rgb(a)( here )

[PaideiaDilemma]

Tested

grad =   rgba(21, 39, 60, 0.2) rgba(21, 39, 60, 0.8) rgba(200, 200, 200, 0.5) rgba(21, 39, 60, 0.8) rgba(200, 200, 200, 0.5) rgba(21, 39, 60, 0.8) rgba(200, 200, 200, 0.5) 45deg
grad = rgba(255, 0, 0,    0.5)    rgb(255, 0,  0)
grad = 0x00FF00 0x00FF00  0xFF00FF00 45deg asdfklajsdflakjsdflk
grad = rgba(255, 0, 0,    0.5) rgb(b3ff1a) rgba(b3ff1aee)
grad = rgb(200,200, 200)  #trailing spaces