Temporary registers, SSH Port, Bug Fixes (#251)

- allows SSH Gitlab connection to have custom port
- introduces temporary registers
- fixes issue w/ quitting the popup on MR creation

This is a #MINOR release

lua/gitlab/actions/miscellaneous.lua

@@ -34,4 +34,8 @@ M.attach_file = function()
   end)
 end
 
+M.editable_popup_opts = {
+  save_to_temp_register = true,
+}
+
 return M