#9085: Set refresh to F5 key in qbrowser

Set refresh to F5 key in qbrowser equally to qapp

http://hub.qgis.org/projects/quantum-gis/repository/revisions/32b05836d50b36f443517ef6a76ac26d49b19b89
Merge pull request #1012 from ahuarte47/Issue_9085-qbrowser

Feature #9085: Set refresh to F5 key in qbrowser