Readd viewsitelink CSS class to page change_form template

This is needed for finer control over the link's styling.
Merge pull request #1726 from jalaziz/fix-viewsitelink

Re-add viewsitelink CSS class to page change_form template
2.4.1 - authors, changelog and version bump
Fix wrong PROJECT_PATH
templates merge
static files merge
admin merge
fixed placeholder tests admins
some tests fixed
toolbar merge
Merge pull request #1728 from deshack/develop

Fix wrong PROJECT_PATH
various fixes
other tests fixed
removes useless statement
fixed plugin move test cases
fixed admin tests
and whole lot of other tests fixed
toolbar test fixes
plugin tests fixed
and some other tests fixed