Updates to hover tooltips for left-hand Filters

[rosanna-smith]

Collection: A group of related objects such as a corpus, a sub-corpus or items collected in a single data collection session.
Sub-Collection: The sub-collections, if any, that comprise a collection.
Access: The access conditions associated with an item.
Record Type: The type or categorisation of an item, i.e. a collection, object or file. For individual files, this field also gives information about the nature of the material, i.e. primary material, transcription, annotation etc.
Language: The language(s) which the content of the item is in.
Communication Mode: The mode(s) (spoken, written, signed, etc.) in which the content of the resource was created.
Linguistic Genre: The style or form of communication to which the item can be assigned.
File Format: The media type and encoding format of the file.