P: Filters are limited in combining options

In LRcc filters there is the option to search in text and/or metadata.

However, although there is an overlap in text or metadata filters (both contain key words as search parameter) I do miss the option to make a combined (search tree) for text in the titles or subtitles, like is possible in the metadata.

Example: As a biologist working with titles and subtitles I would like to find missing subtitles when checking for errors. 

So I would e.g. like to search for Title is not empty, whilst the subtitle is empty.  

This is not possible so far.

It can be enabled by adding title and/or subtitle to the metadata search too, or adding a search line to text search (if you prefer to keep metadata strictly metadata, although key words are neither real metadata)

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