item width is calculated wrong when cp_simplified=true

[jacky-ttt]

in the CollectionPicker class, it uses itemWidth += Utils.dpToPx(getContext(), 30) + textPaddingLeft + textPaddingRight; to calculate the itemWidth.

it does not consider the situation that there could be no item_icon. it should use 0dp to calculate the item's width when simplifiedTags is true.