[Feature request] Make keyword filter case-insensitive

[ask6155]

Checklist (Your issue will be automatically closed if you delete this part)

• I make sure that there are no existing issues - open or closed - which I could contribute my information to.
• I believe this feature request will benefit more than 10% of users, not just myself.

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** Description
It would be great if the filter by keywords option was case insensitive otherwise the same word would have to be added multiple times.

For example currently to block all videos with 'apple' in the title, you have to add all combinations

apple,Apple,APPLE
for all videos to be blocked with the keyword. This just makes the process more tedious.

[InfinityLoop1308]

Thanks. Done in 4.3.0