Non-functional technique filter

[thomasholmrod]

Describe the bug
Selecting technique "quasi-elastic scattering" returns no results
Searching for "QENS" using the text field returns 50+ results.

Same pattern is observed for other techniques

Hence, the technique field is not working as intended.

To Reproduce
See above

Expected behavior
See all data sets generated by the technique selected in the technique field

Additional context
In its current form, the results from using the technique field is misleading and may lead users to believe that there are no data of interest for them.

If this is due to lack of proper meta-data in the data sets and the associated facilities are not willing to fix that, I suggest that users receive a warning or that the functionality is removed.