Cesium stops its render loop after a render error and offers only a
panel that dismisses itself, and a lost WebGL context never draws again,
so the globe froze or went black while the controls kept responding.
The scene chrome now shows an alert dialog with the error. Retry restarts
the render loop and keeps the notice until a frame renders without an
error; after a lost context it reloads the page, whose address keeps the
view. Reset view opens the app root without the restored hash or share
path. An inline conversation panel never reloads its host page. The
application viewer turns off Cesium's own panel; other callers keep it.
createFrameRateMonitor() keeps the key, frame count and interval and
publishes the readout to the gev-status store; the scene chrome renders
it after the subtitle with the same class, hidden state and title. A
page without the title bar still gets no monitor, and a monitor only
updates or withdraws the readout the store shows.
ShellFeedback and the scene director show toasts through createToast(),
each on its own timer as before, and the scene chrome renders the toast.
Every show rewrites the text, so a repeated message is announced again.
ShellFeedback publishes the loading status and the road network chip, and
CctvControls the camera grid chip, to the gev-status store; the scene
chrome renders them. SplitFlapText plays the departure-board cascade that
splitFlap.js plans, writing only the label's one text node, and rests when
its owner is destroyed. setSplitFlapText and disposeSplitFlap are gone.
German Khokhlov