* Add some quick-and-dirty debug info for TileStore
I'm still in need of more detailed data in order to understand why big layout shifts happen in large calls. This adds a developer option to enable logging and a visual indicator for the state of the TileStore. The indicator should be useful for matching up the behavior I'm seeing in my recordings with the right timestamps.
* Reduce performance impact of checking for whether debug mode is enabled
---------
Co-authored-by: Hugh Nimmo-Smith <hughns@element.io>
b834d8f679