Fix reshowing calltip after autoc list closed

Using default priority causes Geany's reshowing idle handler to run
before Scintilla's, changing priority to low in hopes of making it
run after.

src/editor.c

@@ -696,8 +696,10 @@ static void request_reshowing_calltip(SCNotification *nt)
 	if (calltip.set)
 	{
 		/* delay the reshow of the calltip window to make sure it is actually displayed,
-		 * without it might be not visible on SCN_AUTOCCANCEL */
-		g_idle_add(reshow_calltip, NULL);
+		 * without it might be not visible on SCN_AUTOCCANCEL. the priority is set to
+		 * low to hopefully make Scintilla's events happen before reshowing since they
+		 * seem to re-cancel the calltip on autoc menu hiding too */
+		g_idle_add_full(G_PRIORITY_LOW, reshow_calltip, NULL, NULL);
 	}
 }