* add global setting to change between local and utc time
* add control to change time format on detailed views
* tweaks
* adapt uptime graphs to work with utc time from settings
* fix tests
* add maxDiffPixels for SearchResults test
* fix test
* MegaETH: uptime dashboard
Fixes#2906
* basic implementation of mini-blocks
* update socket url and time format
* update mega eth preset
* customize flashblocks name
* clean up
* update color theme variable for mega eth
* [skip ci] don't show alert "scanning new mini-blocks"
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