Filepath ToolTip

[zayKenyon]

EDIT: This PR initially changed the displayed file name to the full path, it pivoted to displaying a tooltip of the file path instead.

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Closes #64, might close #59 too.

It doesn't show the file extension, though I would understand a change so that it did. Tested with the Front Matter Title plugin, all works there.

[tgrosinger]

I would prefer to avoid a proliferation of too many settings. I'm also worried showing the full path in the list will look really cluttered, or actually truncate the most important part of the filepath.

I think putting the full file path into a popup tooltip would be a more visually-simple approach, as it would also allow showing the real filepath when using the frontmatter titles too.

[zayKenyon]

This is the behaviour when using the Frontmatter Titles Plugin.

[zayKenyon]

This could be extended to include the last_modified date as suggested in #39. Personally I would find that useful. Though I understand that it is not the focus of this PR.

Or instead a last_opened like in #66.

It would need to be considered against #76.

[tgrosinger]

Looks great, thank you.