Admin section for managing sounds

packages/rocketchat-custom-sounds/admin/adminSounds.html

packages/rocketchat-custom-sounds/admin/adminSounds.js

packages/rocketchat-custom-sounds/admin/soundEdit.html

packages/rocketchat-custom-sounds/admin/soundEdit.js

packages/rocketchat-custom-sounds/admin/soundInfo.html

packages/rocketchat-custom-sounds/admin/soundInfo.js

...t-custom-sounds/assets/stylesheets/customSoundsAdmin.less

packages/rocketchat-custom-sounds/client/lib/CustomSounds.js

...ages/rocketchat-custom-sounds/client/lib/custom-sounds.js

...t-custom-sounds/client/notifications/deleteCustomSound.js

...t-custom-sounds/client/notifications/updateCustomSound.js

packages/rocketchat-custom-sounds/package.js

...ketchat-custom-sounds/server/methods/deleteCustomSound.js

...tchat-custom-sounds/server/methods/insertOrUpdateSound.js

...cketchat-custom-sounds/server/methods/listCustomSounds.js

...ketchat-custom-sounds/server/methods/uploadCustomSound.js

...es/rocketchat-custom-sounds/server/models/CustomSounds.js

...ketchat-custom-sounds/server/publications/customSounds.js

.../rocketchat-custom-sounds/server/startup/custom-sounds.js

packages/rocketchat-i18n/i18n/en.i18n.json