Hide slider for array size selector in editor

[Meorge]

Closes #102391.

This PR removes the slider from the array size field in the inspector:

The behavior before this PR can be seen in the issue linked above. While not explicitly a bug, per se, the field's range is so wide that the moving the slider the tiniest bit would cause the array size to balloon past anything reasonable for people to make entries in or find a specific value for.

[kitbdev]

I think that the editing_integer property should be used instead, so the up down arrows are shown.

[Meorge]

Thanks for the suggestion! It looks a lot better that way 😄

[Calinou]

• See also Hide EditorSpinSlider slider for VectorNI #102488.

Both PRs are complementary to each other as far as I can tell. I don't understand why integer properties are starting to show sliders in the first place though, as this was clearly not intended by #95169.

[akien-mga]

Both PRs are complementary to each other as far as I can tell. I don't understand why integer properties are starting to show sliders in the first place though, as this was clearly not intended by #95169.

I think the reason is that those property editors don't handle them as integers but as floats. So we need to chase down all such editors to make sure that if they deal with integers, they properly set editing_integer.

[akien-mga]

Thanks!