- the meaning of CustomSortOrder.standardObsidian changes from a fixed one to what is actually selected in Obsidian UI
- the CustomSortOrder.standardObsidian can be applied at a folder level (as the default for folder) and at a group level (this is a major addition)
- added a mapping of Obsidian UI sorting methods onto internal plugin sorting methods, plus addition of the Obsidian UI logic to push folders to the top unconditionally
- !!! NO NEW UNIT TESTS FOR THIS FEATURE - must add later
- not tested manually, as the commits extraction and pushing is done as part of #88 github issue
- new keyword added to support items starred with Obsidian core plugin 'Starred'
- the keyword is `starred:`
- detection and more user friendly handling of the general error condition when the File Explorer is not available
- new ribbon status icon shape to indicate the general error plus detailed error logged to the console