Use prettier buttons

aleksis/apps/alsijil/frontend/components/coursebook/CourseBook.vue

@@ -4,7 +4,7 @@ import InlineCRUDList from "aleksis.core/components/generic/InlineCRUDList.vue";
 
 <template>
   <v-container>
-  <router-link to="/app/alsijil/coursebook/">{{ $t("actions.back") }}</router-link>
+  <v-btn to="/app/alsijil/coursebook/" text color="secondary">{{ $t("actions.back") }}</v-btn>
   <inline-c-r-u-d-list
     :headers="headers"
     :i18n-key="i18nKey"

aleksis/apps/alsijil/frontend/components/coursebook/CourseBookList.vue

@@ -23,10 +23,10 @@ import ListView from "aleksis.core/components/generic/ListView.vue";
               {{ course.subject.shortName }}
             </v-card-text>
             <v-card-actions>
-              <router-link :to="'/app/alsijil/coursebook/' + course.id" text color="secondary">
+              <v-btn :to="'/app/alsijil/coursebook/' + course.id" text color="secondary">
                 <v-icon left>mdi-book-search-outline</v-icon>
 		{{ $t("alsijil.coursebook.open_coursebook") }}
-              </router-link>
+              </v-btn>
             </v-card-actions>
           </v-card>
         </v-col>