[BUGFIX] Extend Share font character set

The four variations of the Share font contain now over 550 glyphs.
The bold-italic variation is also added to complete the font family.

Change-Id: I04578cc7da74319662428e688e8152403dfc04b1
Resolves: #49996
Releases: 6.2
Reviewed-on: https://review.typo3.org/23482
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert