[Feature request] Add sorting/filtering options to "my stakes" list

[mdPlusPlus]

When you are operating and/or contributing to a lot of nodes the "my stakes" overview gets very confusing.
It's takes very long to find a specific node if you want to unlock it for example and it can easily be overlooked.

I propose two things:

1. Add sorting options to "my stakes"
   • Sort by operator fee (desc, asc)
   • Sort alpanumerically by Service Node key
   • Sort chronogically by time of staking/registering/full stake
2. Add filter mask
   • Filter should apply to the Service Node keys, so one can quickly find a SN by typing part of the key into the filter field