* create new summary field for challenges
* finish implementating summary for challenges, add some support for guilds
* make small improvements to challenges code
* fix lint errors
* add more code to support summaries for guilds (still more needed)
* fix existing tests by adding summary field
* make existing tests pass
* WIP make "Public Challenges" text translatable
* change "leader" locale key to "guildOrPartyLeader" to make searches for it easier
* remove v-once from h2 headings
* remove failed attempt to localise text in <script>
* add quick-and-dirty error checking for guild not having categories
* make "Public Challenges" text translatable
* rename final ...PlaceHolder strings to ...Placeholder (lower-case "h") for consistency with existing Placeholder strings
Alys
7d0ab1ba25