Sequence Editor - very difficult to determine current sequence on modification/save

[Mgamerz]

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Describe the bug
Sequence Editor is very inconsistent in dispalying the current selected sequence. It often 'deselects' a sequence, which means you have no idea what sequence you are in. In files that have multiple duplicate named sequences - it makes it extremely difficult to tell which export is selected. Additionally, if a sequence is modified, you have no way to tell what is selected.

To Reproduce
Open Sequence Editor, any package.

For the export modification issue, simply edit an object in the sequence - such as cloning, trashing, etc.

For the unselected UI, you need to modify an export, and then save the package, so the modification layer goes away. You are then left without any selected sequence color coding. This is a very common occurrence.

Expected behavior
Tree view should behave like package editor's tree view and properly update on save and have selections visible

Screenshots and files used to replicate this
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Version information:
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Nightly

Stack trace
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Other information
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