VERSION 1.1.1394: improved ppost_*_noise-variations

I now improved the new ppost_*_noise-variations, which allow to modulate flames to give them a more organic look. Also, there are some other small fixes.

Complete changelog:
VERSION 1.1.1394 (01.10.2025):
- application-settings: only display top-level items in the tree-view
to make the UI more clear (SWAN-157)
- application-settings: changed the settings panel on the right to occopy
any free space available
- variation-browser: special handling for the "julian"-variation, where Godot
only shows "julia" (why?) (SWAN-155)
- flame-library-module: also added a "open folder in filesystem"- button like
in the small flame-library-window
- flame-library-module: double-click at the flame-preview hides/shows the right
container with the meta-info, to make it possible to see more of the fractal
- "pointgrid_wf"- and "pointgrid3d_wf": fixed the claculation of random distortion,
so that the seed-parameter has an effect now (SWAN-158)
- fixed the displacement-calculation in the "ppost_*_noise"-variations, they now
work as expected
- fixed a bug in the flame-loader regarding containing multiple flames into one file