Range slider limit is 29, even when is set to 30

[jozefbudac]

INPUT: 0.9.8 releases
OS: both iOS & Android

Steps to reproduce:

1. open project input-testing/forms_widgets
2. add a feature to POI layer
3. in the form on tab 'Numbers' there is a Range slider, which is set to: min -10, max 30, step 3. But the slider allows do to max 29 and can't be moved further

I am not sure, but I believe this worked in previous versions, so I marked is as regression

[PeterPetrik]

Thinking about it more, this is not a bug.

In the forms_widget allowed slider values are -10, -7, -4, -1, 2, 5, ...., 29. One can set value only if it is possible to get it via MIN_VAL + n . STEP, so starting from -10 and step 3 one is not able to get 30.