Beastmaster: props -> congratulate (remove slang)

"give this user props" is an idiomatic phrase that non-native-English speakers could have problems with, especially since "prop" is also a noun that refers to an object. 

A player in the Tavern today said, _"Yeah! Beast Master Quest Complete! :D What about this 'give this user props!', am I going to get some cool gear or sth? :D"_  I had to disappoint him with the sad truth. :)
"No Back Accessory" for base back - fixes #3640

Changes the text and notes for the base back gear from "No Helm" to "No Back Accessory".
Merge pull request #235 from Alys/patch-2

"No Back Accessory" for base back - fixes #3640
Merge pull request #233 from Alys/patch-1

Beastmaster: props -> congratulate (remove slang)
chore(i18n): update locales
add string to groups.json

step 1: https://github.com/HabitRPG/habitrpg/issues/3649 dataTool string
Merge pull request #236 from wc8/patch-3

add string to groups.json
feat(mystery): mystery items 062014
chore(i18n): update locales
feat(dilatory): Add dilatory boss. Add limit-break (rage) to bosses. Add defense
fix(bosses): Limit Break => Rage
fix 2 spelling mistakes

havock -> havoc
Habitca -> Habitica
feat(dilatory): better strings for negelect strings & completion, + formatting
Merge pull request #237 from Alys/patch-1

fix 2 spelling mistakes
chore(i18n): update locales
Check if items are owned before equipping

This checks if the user actually owns the pet, mount or gear they are trying to equip. This also prevents users from setting things that do not exist. (before users could set the value for pets and mounts to any string. Not sure if this leaves possiblilities for xss attacks. but this fix also prevents that).
Merge pull request #238 from vIiRuS/patch-1

Check if items are owned before equipping
feat(dilatory): broken matt
add moderator names (moderatorList.json) and associated text (moderatorIntro* in groups.json) for displaying at the top of Tavern chat
Fixed a typo ("whe" --> "when")