Websocket Stream Stats & Robustness Improvements (#605)

* wip support for a stats overlay

* WIP adding stream stats. But.... eeeh. Corporate.

* kbits over mbytes

* A ton more tweaks:

- Increased thread priority for streaming to reduce "stutter/slow" issues
- revised client side URL creation order to prevent the possibility of repeat-identical URL's
- Improved overlay to only be visible on mouseover, and fully centered in the screen

* wpiformat on js

photon-client/src/components/common/cv-image.vue

@@ -9,6 +9,7 @@
   >
 </template>
 
+
 <script>
     export default {
         name: "CvImage",