Issue number: resolves#28435
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## What is the current behavior?
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The item in the last item-sliding still has a border in an inset list.
## What is the new behavior?
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this PR. -->
- Item in last item-sliding no longer has a border
I originally only added `ion-item-sliding:last-of-type ion-item` but I
discovered that the original `ion-item:last-child` causes items in
item-sliding where the item is the last element in the item-sliding
container to not have a border, so the original fix was incomplete.
I added comments as to what each line does and why we didn't just do
`ion-item:last-child`.
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
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and migration path for existing applications below. -->
## Other information
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screenshots of how the component looks before and after the change. -->
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Co-authored-by: Brandy Carney <brandyscarney@users.noreply.github.com>
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Co-authored-by: ionitron <hi@ionicframework.com>
Co-authored-by: Brandy Carney <brandyscarney@users.noreply.github.com>
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