HTML in filters not possible any more

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Describe the problem you’re having:

On the latest version it’s currently not possible to add HTML tags inside filters. They are stripped out when saving.
For Example the Filter <strong>Some Text ends up as Some Text

If possible include steps to reproduce the problem:

see above

tt-rss version (including git commit id):

Tiny Tiny RSS v17.12 (bb0a8e3)

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:

Debian

yeah, i guess this gets filtered out with all the other html from user input

matching raw html with regular expressions is generally a fools errand but this might have its uses in filters so i’ll make a note to bring this back