Modified the initialization of const var m_maxRecentProjects in Project.h to...

Modified the initialization of const var m_maxRecentProjects in Project.h to make it static to stop compiler warnings showing up on prog26.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@8293 41f8697f-d340-4b68-9986-7bafba869bb8