While doing some other changes in this area I noticed that the ordering of the buttons here is somewhat strange.
| Before | After |
| {F8536112} | {F8536113} |
I know some of it will come down to personal preference, but here are some benefits:
1. X / Y values orders are all consistent, between handles and the keyframe.
2. Values are labeled consistently, with just "Frame" and "Value"
3. The more important property that can affect the others comes first.
4. The "type" property provides nice visual separation between the handle properties.