Fix uncaught exception of zcl_abapgit_repo_srv (#4215)
Fix uncaught exception of zcl_abapgit_repo_srv (#4215)

When repeatedly navigating "back" to the main screen via the "Repository List" [o] button:
If somewhere in this navigation sequence you Remove a repository,
then continue on via "Repository List",
but later you use the GUI's actual "BACK" button, until you have returned to the main screen where that repository still existed,
a short dump occurs as the exception raised by zcl_abapgit_repo_srv=>get in zcl_abapgit_gui_page_repo_view->render_content propagates unhandled

Co-authored-by: Lars Hvam <721d1b171982cd84b755f6b25130d2b88cd1f696@hotmail.com>
EduardoCopat/abapGit,EduardoCopat/abapGit,sbcgua/abapGit,larshp/abapGit,larshp/abapGit,sbcgua/abapGit