Save open/closed folder state in scripts tab across sessions

[kierio04]

Would it be possible to save which folders were open/closed in the scripts tab from a previous session, so you don't have to reopen folders each time you close/reopen dolphin? This wasn't a huge problem before TASLabz/mkw-scripts#49 as there was only a root scripts folder where everything was accessible from, however with those changes, it becomes a minor inconvenience to open folders for every TASing session