All EVRs should be streamable without module filter

[davetsay]

Describe the sustaining activity
Currently, EVR streams that don't include a levels filter, requires a modules filter. Therefore, to stream all EVRs, one must use a filter `module=(module_1,module_2,...module_n).

This is done because of MCWS RESTful API User's Guide comment,

For EventRecord streams, a filter containing “module” is mandatory.

Through some testing, this doesn't appear to be true. It could be a best practices comment so that one does not overwhelm the server with a flood of noisy EVR data. If this isn't a limitation though, we shouldn't use a hack to get the same result.

Some dictionaries may contain hundreds or even more modules.

(Regression)Testing Instructions

1. Enable realtime mode and connect to a realtime session
2. Click on main EVR node and see that all EVRs stream
3. Click on a EVR level node and see that only EVRs for that specified level stream
4. Click on a EVR module node and see that only EVRs for that specified module stream
5. Click on a EVR name node and see that only EVRs for that specified name stream

Additional context
see #388