* PSFD-455: Iterate on search results for message bubbles
Though not perfect, this is a bit better than it was before. Specifically, we ensure our matching for `isOwnEvent` correctly identifies the user and that the results don't look *awful*.
There's still room for improvement, but this should be a measurable improvement itself. Most notably, this doesn't fix a couple obvious bugs due to complexity:
* Message bubbles have the wrong corners for the display format (pre-existing).
* The sender's own messages are missing avatars/names. This is just way too complex to fix.
**Requires https://github.com/matrix-org/matrix-js-sdk/pull/2004**
* Tweak opacity
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>
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