Add flex time so that the next program in time slots happens AFTER the current time. This is specially good for weekly slots, because programming won't start at Thursday for no reason anymore.

src/services/time-slots-service.js

@@ -325,6 +325,9 @@ module.exports = async( programs, schedule  ) => {
         }
     }
 
+    if (ts > t0) {
+        pushFlex( ts - t0 );
+    }
     while ( (t < hardLimit) && (p.length < LIMIT) ) {
         await throttle();
         //ensure t is padded