Adds support for optionally showing disclosure arrow buttons

[wolthers]

The theme currently doesn't support recursively opening or -closing folders by cmd+shift-clicking the disclosure arrows next to the folders (because they're hidden in the theme). This PR adds an optional setting to show the arrows. It is not to be confused with the predawn_sidebar_arrows option, which essentially just replaces the folder icon with an arrow icon as cmd+shift-clicking these doesn't do anything.

Changes made:

• Made new disclosure arrow icons with same stroke width as the file type icons
• Remade the close-file icon to match the thickness of the above icon
• Documented the new option in README.md
• Moved folder icons (@2x versions only) up 1 px to better align with the file name. Didn't need to change the 1x versions as they were already correctly placed

  Screenshots:

With Show open files disabled

With Show open files enabled

[jamiewilson]

Well done! Thanks for the help. I'll try to pull these down today and let you know if I have any questions/feedback before merging.

[wolthers]

You're welcome, thought i'd share it. Let me know if anything is missing!

[wolthers]

@jamiewilson: Any comments thus far?

[jamiewilson]

Unfortunately, no. Haven't had a chance to look at it yet but I should be able to this week. I'll keep you posted.

[wolthers]

Ping :)

[jamiewilson]

Hey man, thanks for the reminder! I'm really sorry, but I've got some other things taking priority over this right now. But it shouldn't be too much longer!

[jamiewilson]

Hey man, I have a small change to this PR: hiding disclosure icons when predawn_sidebar_narrow: true is set. If you want to review here and implement in your PR, I can merge.

https://github.com/jamiewilson/predawn/commit/dbf6a9fb2e5fa9ba10dbb4f76b93933d908e36c1

Thanks for your patience with this. Sorry it took so long.

[jamiewilson]

Hey @wolthers. Wanted to make sure you saw this.