Carry the panel stylesheet into forgetest

The acceptance page shares theme.css with the panel byte for byte, and forgectrl's copy gained the setup header's Download logs button. CI caught the drift, which is what that check is for; the pinned revision decides, so the copy follows.

forgetest/forgetest/ui/theme.css

@@ -238,6 +238,7 @@ header {
   margin-left: auto;
 }
 #themebtn,
+#logsbtn,
 #logoutbtn {
   background: transparent;
   color: rgba(255, 255, 255, 0.75);
@@ -249,6 +250,7 @@ header {
   white-space: nowrap;
 }
 #themebtn:hover,
+#logsbtn:hover,
 #logoutbtn:hover {
   color: #fff;
   border-color: rgba(255, 255, 255, 0.6);
@@ -692,3 +694,13 @@ footer a {
     padding-right: 12px;
   }
 }
+
+/* The setup's log-bundle line, under the header: the result of the
+   header's Download logs, or why the machine refused it. */
+.wz-logs-msg {
+  max-width: 1100px;
+  margin: 6px auto 0;
+  padding: 0 16px;
+  min-height: 16px;
+  text-align: right;
+}