Add default comment sort order setting, refactor comment sorter

[c-oreills]

Partially addresses https://github.com/burhan-syed/troddit/issues/146 by adding a Default Comment Sort Order setting with a dropdown.

Default post sort order is more involved, due to the nested range parameter within the Top sort setting. I've started with comments since they're simpler.

The settings code should be extensible to adding default post sort order in future, though the menu will either need nesting or the range displayed in the main list.

SortSelector.tsx borrows heavily from the existing ThemeSelector.tsx. There is an opportunity to refactor the two to make a generic settings selector. I have not had time to implement this so have left a comment in the new SortSelector.tsx file.

Manual tests run:

• Checked that selecting a default sort order in settings correctly sets the default in comment threads.
• Checked that specifying a sort order on a post's comments does not override the default setting.
• Cleared localstorage/cookies and confirmed that the sort order persists between sessions.
• Created a session with the code on master then checked out the new code. Confirmed that the default Top comment sort order is preserved and no corruption of existing sessions occur.

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[burhan-syed]

Can you move the setting to the comments section? And shorten the setting name from "Default Comment Sort Order" to "Default Comment Sort" to reduce line wrapping on small devices. Thanks for the PR!

[c-oreills]

@burhan-syed yep, done!

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Name	Status	Preview	Comments	Updated
troddit	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 30, 2023 at 10:44PM (UTC)