Embed: improved display of UI for small player widths

- increased "small player" threshold from 200 to 300px
- hide totalTime element when below threshold
- text-overflow: ellipsis for currentTime element, put content in title attribute

embed/skins/default.css

@@ -126,6 +126,11 @@ svg.icon.timeout {
 .mistvideo[data-show-submenu] .mistvideo-controls {
   bottom: 0;
 }
+.mistvideo-currentTime {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
 .mistvideo-videobackground {
   position: absolute;
   width: 100%;