Value of DragValue correctly clamped

[vihdzp]

Closes #404.

[emilk]

Good catch! There is one additional line that needs fixing. At the end of the function there is this:

response.changed = get(&mut get_set_value) != value;

this should probably be changed to

response.changed = get(&mut get_set_value) != old_value;

so that we also set the changed flag when the value changes due to the clamping.

[vihdzp]

I've implemented this fix in the latest commit.