* Changes in function `Utils.displayDate`:
- uses 'MMMM DD' for dates with current year
- uses 'MMMM DD, YYYY' for other years
- corresponding unit tests added
* Changes for input inside `EditableDayPicker`:
- uses `Utils.displayDate` when day picker is not visible
- uses preferred date format while day picker is visible
- uses preferred date format for input placeholder
Co-authored-by: Chen-I Lim <46905241+chenilim@users.noreply.github.com>
Co-authored-by: Harshil Sharma <harshilsharma63@gmail.com>
Co-authored-by: Scott Bishel <scott.bishel@mattermost.com>