Maybe add Multiple row feat for edit tabs, useful for source code explore
Answered
Take netty for example

object Oriented language have many extends, It's hard to explore source code trace the execute flow from the extends chain, if we put the same "kind" class in the same row of edit tabs, and put them in order to the class extends order. It will be very helpful to explore source code,
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Maybe duplicated with https://intellij-support.jetbrains.com/hc/en-us/community/posts/206814575-Thought-you-could-have-tabs-both-multi-row-and-alpha-sorted
but consider the multirow edit tags
Feel free to submit a request at https://youtrack.jetbrains.com/issues/IDEA with the suggestions how it should look like.
One row per class hierarchy? This can quickly grow to many rows occupying the previous vertical space.