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