Well done her, umiaisha.
I think I'd leave the litter tray there until you've found out what her new pattern is anyway. I'll confess to being a little cowed on the matter of indoor tray use by having two outside-going cats who both preferred to do their duty in the house. (Warm, dry, safe, self-cleaning etc - I could understand their point and to be honest, I didn't mind. Tray cleaning doesn't bother me, it saves complaints from neighbours about poo in their roses and it enables you to keep an eye on their general health via their innards.)
So - When? I'm afraid I don't know. It's rather down to her - and the weather outside may influence things. (Cold, wet, packed and crusty earth, all those will come to bear.)
And the jumping? Again, I reckon it's down to her and to the incentive for doing it. She might turn out to be a real homebody/gardenbody or she might suddenly develop an adventurous streak, especially if it's nice weather and she's in hot pursuit of something. I wouldn't assume a thing from her build - they can always surprise you.
