Update span to include qb-web version

[jef]

Description

It would be nice to see the release version of qb-web in the UI somewhere. Could be a low hanging fruit that would be nice. Perhaps even compare it with latest and show if an update is available.

I'm not great with Vue, but I imagine it would look something like this below:

https://github.com/CzBiX/qb-web/blob/master/src/components/Footer.vue#L12-L23

      <div v-if="!phoneLayout">
        <v-tooltip top>
          <template v-slot:activator="{ on }">
            <span v-on="on">
              qBittorrent {{ app.version }}
            </span>
          </template>
          <span>
-            API version: {{ app.apiVersion }}
+            API version: {{ app.apiVersion }} | qb-web version: {{ app.qbWebVersion }}
          </span>
        </v-tooltip>
      </div>

[jef]

#56 #57 Somewhat related

[jef]

Thank you @CzBiX!