Feature/rescan and ux changes

[atendev]

I was changing things for my own vault since i encountered some bugs and such, so i went ahead and compiled it all. Sorry its a lot of changes at once. By the time i was done I realized I never committed any of it and they all used the same files.

Great job on the plugin though, it looks great! Both the code and the UX.

Changes

• Switch author-color scanning to manual. Used to run on each keystroke which added a lot of names to the list when author-colors was switched on. Now you simply input authors, click rescan, and then it scans everywhere.
• Add "Available Authors" as a comma separated list of authors for you to choose from when making a new comment. For those who want to be able to choose between multiple comment authors while also keeping a single data file.
• Add trash remove icon for uncolored authors to fully remove them from the list as there was no way to do so previously.
• Add author selector into the comment creation modal.
• Separate highlights from comments being shown. Now highlights can still be active even if in-line comments are not shown.
• Add "Show Highlights" and "Highlights Open Sidebar" settings. When clicking on a highlight and comments are hidden, will open the sidebar to the comment in question while still allowing to edit the text as normal.
• Move the main action bar up to the corner of the modal since it could get in the way of text on smaller screens.
• Make border of the add-comment modal the color of the selcted author for better UX.
• Add "Add Comment" button to the context window when right clicking selected text.
• Update tests