Move jquery.valueview.experts.commonsmediatype to mediawiki resources, define dependency

On test.wikidata, it's not finding mediawiki.util.wikiUrlencode with
resource loader.  Works in debug mode.

this expert 1) depends on mediawiki 2) try to explicitly define
the dependency, even though mediawiki.util is always loaded...
maybe just not in the correct order now.

Change-Id: I93f1cb373aae1cbd4079916780223c0d5f446c05
(cherry picked from commit 9a4e22751650b2b27c1a0cd7695a96ad081788ab)