refactor(templates): Bootstrap's components instead of the panel's own CSS for capacity, steps and disclosures

The fork's own rules in webvirtcloud.css redid what Bootstrap 5.3 has:
- the capacity bars (.cap-*) are Bootstrap progress bars: the memory a
  .progress-stacked of running VMs' memory and shut-off VMs' (at half
  opacity), each segment a progressbar with its amount as its value
  text; the pool bars a thin .progress. The line where the host's
  memory ends goes: the share above the bar says it, red when over;
- the status dot (.compute-dot) is a rounded-circle, the big figures
  (.compute-ratio) fs-4, the Computes table's cell padding py-3;
- the steps of creating a VM (.create-steps) are a breadcrumb with "›"
  as its divider;
- the XML and Advanced disclosures (.disclosure with a turning chevron)
  are Bootstrap accordions;
- the chosen volumes and networks (.row-list) are list-unstyled, their
  names text-break;
- a chart's container is position-relative by utility; its height stays.
Dead rules go too: .netIN, .netOUT, .diskRD, .diskWR, .input-xs and
.bottom-bar-margin had no users.

computes/views.py

@@ -35,13 +35,13 @@ def shown_capacity(compute):
     be read."""
     given = compute.capacity
     if given:
-        # the memory bar: running and shut-off VMs' memory, and a mark at the
-        # host's memory, on a scale that holds whichever is larger
+        # the memory bar: running and shut-off VMs' memory, on a scale that
+        # holds the host's memory or all given, whichever is larger
         assigned, memory = given["assigned"], given["memory"]
+        assigned["stopped"] = assigned["all"] - assigned["running"]
         scale = max(assigned["all"], memory) or 1
-        given["bar"] = {"running": assigned["running"] * 100 / scale,
-                        "stopped": (assigned["all"] - assigned["running"]) * 100 / scale,
-                        "host": memory * 100 / scale, "over": assigned["all"] > memory}
+        given["bar"] = {"running": assigned["running"] * 100 / scale, "stopped": assigned["stopped"] * 100 / scale,
+                        "over": assigned["all"] > memory}
         given["memory_percent"] = round(assigned["all"] * 100 / memory) if memory else 0
         given["vm_count"] = sum(given["vms"].values())
         # the default pool (else the first) shows; the others (a host may