Small update - path pasting and bugfixes

When converting a .xdts to .oca, you can now paste paths into the path selection boxes if you don't want to use the internal file browser.

Dragging and dropping a .xdts with the xdts export settings are already open will no longer cause issues. The window will no longer shrink and the data will be updated properly.

Fixed a bug when exporting to .oca if the imported .xdts uses instruction symbols such as SYMBOL_NULL_CELL × and  SYMBOL_TICK_1 ○. These were erroneously being treated as regular frames, but are now skipped.

Adjusted font color in path selection boxes to make text more readable