Fix typo
Clean up Prefs labels and remove unnecessary * from IGNORED_EXTENSIONS
v0.0.1.27

-Check for a valid host setting. If the host is unreachable, reset to
localhost:32400
-Sometimes the web client will reload the scanStatus and if the scanner
was not running it would trigger a new scan. It now presents a menu to
view the last results or go to the main menu.
-Moved ignored files checking from findUnmatchedFiles() to listTree() to
put it alongside checking .plexignore. This helps optimize the code a
bit.
-Cleaned up some unnecessary code.
-bScanStatusCount will now only count valid files in listTree(). Allows
a more accurate count of the expected number of files from the database.
-Fixed a typo in DefaultPrefs.json and cleaned it up a bit.