make source-course display conditional

Author: NiloCK

packages/common-ui/src/components/StudySession.vue

@@ -1,13 +1,9 @@
 <template>
   <div v-if="sessionPrepared" class="StudySession">
     <v-row align="center">
-      <v-col>
-        <h1 class="text-h3">
-          {{ courseNames[courseID] }}:
-          <v-progress-circular v-if="loading" color="primary" indeterminate size="32" width="4" />
-        </h1>
-        <v-spacer></v-spacer>
-      </v-col>
+      <h1 class="text-h3" v-if="courseNames[courseID]">{{ courseNames[courseID] }}:</h1>
+      <v-spacer></v-spacer>
+      <v-progress-circular v-if="loading" color="primary" indeterminate size="32" width="4" />
     </v-row>
 
     <br />