Removing translateString forces using data-i18n attributes, to make sure we do not forget to set them. Missing data-i18n attributes is a problem with late loading where we can end up without translation, without text. Missing data-i18n attributes is also problem that strings will not be translated when changing language.
Fixes a bug in invite dialog, where remove password button was shown for non moderators.

We pass key which is enough to obtain the title.

Fixes issue of method 'setTooltip' in modules/UI/util/UIUtil.js: Excluded 'Uncaught TypeError':
```
UIUtil.js:134 Uncaught TypeError: Cannot read property 'setAttribute' of null
```

Uses some ES6 syntax. Also removes inputHeight key for resolution as it makes no sence to have dictionary with one key. Removes some code duplication. Makes code consistent: method params for updateLocalStats and updateRemoteStats.