# Objective
`ButtonBundle` has an `ImageNode` component (renamed from `UiImage`)
which wasn't a problem in 0.14 but in 0.15 `requires` pulls in the
`ContentSize` and `NodeImageSize` which means that by default
`ButtonBundle` nodes are given a measure func based on the size of the
image belonging to `TRANSPARENT_IMAGE_HANDLE`, which is 1x1.
This doesn't make sense and the behaviour for default image nodes should
either be to go to zero size or not add a measure func.
## Solution
Check if an image has a `TRANSPARENT_IMAGE_HANDLE` and if it does remove
its measure func.
Possibly a zero-sized measure would make more sense, but that would
break existing code.
## Testing
Used `ButtonBundle` in the 0.15 `button` example and the border doesn't
render, after this change it does.
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