Merge branch 'bl/gitweb-project-filter'

* bl/gitweb-project-filter: gitweb: Make project search respect project_filter gitweb: improve usability of projects search form gitweb: place links to parent directories in page header gitweb: show active project_filter in project_list page header gitweb: limit links to alternate forms of project_list to active project_filter gitweb: add project_filter to limit project list to a subdirectory gitweb: prepare git_get_projects_list for use outside 'forks'. gitweb: move hard coded .git suffix out of git_get_projects_list