doRefreshAndRender() returned at once when a refresh was already running. An
import asks for a refresh after its address scan. During a refresh, that
request was dropped. The addresses the scan found then showed 0.0000 until the
next ten-second refresh.
While a refresh runs, a request through ctx now sets a flag. One more refresh
runs once the running one ends. Several requests in that time lead to one more
refresh, not several. A tick of the ten-second timer that finds a refresh
running is still dropped.
Model: opus-5-5
