Handle deleted numbering tool items so that the numbering is consecutive

[DamirPorobic]

User Feedback: When badges are deleted, we should probably reset the counter. Two workflows I imagine. 1) Delete all badges to start again - should reset to 1. 2) "Undo" one or more badges - count should start from the last highest number. In fact, how Greenshot does it, is it always keeps the numbers consecutive. E.g. if you have 1, 2, 3, and delete 2, then 3 becomes 2, and you end up with 1, 2. This is probably the best way to do it, otherwise you could easily end up with missing numbers.