fix(dashboard): mark every widget dirty on live tick

onLiveTick was only calling markDirty() when the widget carried a
Sensor or Tag property. That left stuck-on-first-render any widget
bound through another mechanism:

  - StatusWidget / IconCardWidget with 'Threshold' = MonitorTag (no
    Tag/Sensor), used throughout the demo
  - MultiStatusWidget (uses a 'Sensors' cell array, not the scalar
    Sensor / Tag base properties)
  - ChipBarWidget (per-chip StatusFcn closures)
  - Any widget driven by ValueFcn / DataFcn / StatusFcn

Those widgets rendered once with their first value and then stayed
frozen because:
  Dirty flag is cleared to false at the end of every tick (line 1015).
  The guarded markDirty on the next tick never re-fired for them.
  So the 'if w.Dirty && ...' gate at line 967 was never satisfied.

Mark every widget dirty every tick; the widget-local refresh() still
decides whether anything actually needs redrawing. Trivial widgets
(text, divider, image) absorb the call as cheap no-ops.

Regression suite: 80/80 green (one run flaked on the known Octave
test_toolbar segfault; re-ran clean).

Author: HanSur94

libs/Dashboard/DashboardEngine.m

@@ -954,9 +954,16 @@ function onLiveTick(obj)
             % (PostSet listeners on Sensor.X/Y do not fire reliably in Octave for indexed assignment)
             for i = 1:numel(ws)
                 w = ws{i};
-                if ~isempty(w.Sensor) || ~isempty(w.Tag)
-                    w.markDirty();
-                end
+                % Mark every widget dirty on every live tick. The previous
+                % guard (`~isempty(w.Sensor) || ~isempty(w.Tag)`) skipped
+                % Threshold-bound widgets (MonitorTag-backed StatusWidget /
+                % IconCardWidget), Sensors-plural MultiStatusWidget,
+                % ChipBarWidget (per-chip StatusFcn), and any widget using
+                % StatusFcn / ValueFcn / DataFcn — so their dots / labels
+                % never moved once the initial render was done. Tick
+                % everything; the widget-local refresh() decides whether
+                % anything actually needs redrawing.
+                w.markDirty();
                 % Dead-handle recovery: panel was destroyed (e.g. by a layout bug or
                 % figure-close race). Drop Realized so the next scroll-realize pass
                 % can rebuild it, and skip this tick.