InfoboxBuilder extension

Variables should be all [lowercase](https://github.com/Wikia/guidelines/blob/master/SCSS/CodingConventions.md#variables).

Also, there should be [no space between the variable or property and the colon](https://github.com/Wikia/guidelines/blob/master/SCSS/CodingConventions.md#spaceafterpropertyname). This should be fixed throughout the file.