style improvements

- added empty state to list
- styled scrollbars
- progressbar shows time elapsed
- timers are monospace
- prevent overflow in titles

client/src/features/viewers/lower/Lower.module.css

@@ -1,8 +1,12 @@
 .lowerThird {
+  margin: 0;
+  box-sizing: border-box; /* reset */
+  overflow: hidden;
+  width: 100%; /* restrict the page width to viewport */
+  height: 100%;
+
   color: #fffffa;
   font-size: 4vh;
-  width: 100%;
-  height: 100%;
 }
 
 .lowerContainer {
@@ -36,6 +40,13 @@
   position: relative;
 }
 
+.titleContainer,
+.subtitleContainer {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
 .titleDecor,
 .subDecor {
   grid-area: decor;