LPS-38199 Remove redundant manage options from site admin actions
LPS-38199 Create a direct link to the Site Administration of a site template
LPS-38199 Add Site Template Settings option for Site Templates
LPS-38199 Use siteGroup instead of scopeGroup. While both will work in this case, the former is more semantically correct.
LPS-38199 The name of the portlet should be "LayoutSetPrototypeSettings / Site Template Settings". The words Prototype and Template should not be plural because it's for the settings of one site template.
LPS-38199 Use the parent struts path since that's the pattern in other similar portlets
LPS-38199 This logic was not correct. The only reason for denying access to the portlet is when the current group is not a site template.
LPS-38199 Remove link to site template pages.

Now the "Visit Site Pages" link should be used, as for any site.
LPS-38199 Redirect to Site Templates Settings after creating or updating a Site Template
LPS-38199 Take into account when determining the selected item in the CP secondary navigation (pills) that now Site Administration is also used for Site Templates
LPS-38199 Use the Site Settings logo for the Site Template Settings portlet since their functions are very similar and they won't be shown together
LPS-38199 Change condition to make it more future-proof
LPS-38199 Lang keys