More filters and info for members summary in C# NaviBar drop-down

[wmjordan]

• A further distinction between readonly and read-write properties would be nice

Distinction does exist. Those readonly properties, auto-properties, init-only properties, static members, async members, etc. do have their special icons on the right side of the drop-down list. Perhaps I shall present a legend at the bottom of the list to tell the user what those icons mean.

Originally posted by @wmjordan in https://github.com/wmjordan/Codist/issues/206#issuecomment-1178432438