Add hide filters

[basp1]

Add filters which hide (collapse or totally hide) lines by matching pattern

[variar]

Somewhat connected to #22

[ArsMasiuk]

It would be very useful to have such filters, therefore +1 👍

[nowhszh]

We can quickly see the context related to the filter logview in the main logview, what are the advantages of hiding non-matching rows vs. the current implementation

[airgithuber]

It is often necessary to remove spam of certain messages of the same type from viewing the log file, the abundance of which does not make it possible to form an adequate picture of the log. The feature is vital when you work with logs in which there are tons of spam.

[liftchampion]

+1