Filter jobs using multiple tags

[tdudgeon]

As in old squonk, it would be useful to be able to filter jobs using multiple terms.
e.g. enter "rdkit similarity" into the filter box and you would see only items that had both tags.
Space would be used as a separator. Some keywords do contain spaces e.g. the max-min-picker job has a "ligand preparation" keyword, but this shouldn't be a problem if the terms are used with "contains" logic. So that if user type "prep" then that job would be found, as it would if they typed "lig prep".

Also, the filter should also be applied to the job name as well as the keywords which I don't think it does at the moment.