[Feature Request] mood summary by word filtering

[lounne]

I would like to be able to have a mood summary for a specific word. Like an average mood of all the days i used this word (which could be a word i use like a tag in the text) and maybe a chronological graph of the mood too.
Would be useful to see if a situation or activity is improving or staling.

[Demizo]

This could be covered by the inclusion of tags, see #98. The idea is to allow for comparing tag/trackers on the statistics page. For example, comparing an exercise tag to your mood over time. That said, it may be nice to also compare keywords from log text.