inline if didn't work. Added intermediate register_event function in transition library

contrib/quicktag.lua

@@ -45,6 +45,7 @@ USAGE
 
 local dt = require "darktable"
 local du = require "lib/dtutils"
+           require "lib/darktable_transition"
 local debug = require "darktable.debug"
 
 local qt = {}
@@ -257,7 +258,7 @@ if dt.gui.current_view().id == "lighttable" then
 else
   if not qt.event_registered then
     dt.register_event(
-      CURR_API_STRING >= "6.2.1" and "quicktag", "view-changed" or "view-changed" ,
+      "quicktag", "view-changed",
       function(event, old_view, new_view)
         if new_view.name == "lighttable" and old_view.name == "darkroom" then
           install_module()
@@ -270,7 +271,7 @@ end
 
 -- create shortcuts
 for i=1,qnr do
-  dt.register_event(CURR_API_STRING >= "6.2.1" and "quicktag", "shortcut" or "shortcut" ,
+  dt.register_event("quicktag", "shortcut",
 		   function(event, shortcut) tagattach(tostring(quicktag_table[i])) end,
 		  string.format(_("quicktag %i"),i))
 end