Incorporate Vue string and date filters in JSPs

[Glen Mazza]

https://github.com/vuejs-community/vue-filter-date-format

https://cdn.jsdelivr.net/npm/vue-filter-date-format

Entries.jsp: {{entry.pubTime | date:'short'}}, {{entry.updateTime | date:'short'}}, {{entry.title | limitTo:80}}

[Glen Mazza]

Done as part of #1045