Enhancement Discussion table with search field

[psmits1567]

We have a nice feature called "Discussion"
Every time a discussion is started a record is written into the discussion table.
But if the author or someone else asks after a while which original it was, you cannot find it back from within this table.
It would be great to have the possibility to filter the table on project via an input field.
The list provided should be sorted on date added, so the latest entry is shown on top.