Feature Request: Snapshots from EBS volumes attached to EC2 instance in Visual Studio Toolkit

## Expected Behavior

I want to get a list of EBS snapshots associated with an EBS volume that is attached to an EC2 instance. I can get the list of all EBS volumes attached to an EC2 instance by selecting the instance from EC2 Instances list. I wish I could drill down to navigate from one of those volumes to a list of its snapshots.

## Current Behavior

Currently I have to read the EBS volume ID from EC2 Instances list, and then go to EBS volumes list and scroll down until I can see the same volume ID. It doesn't even have a search capability.

## Possible Solution

Either allow drill down from EBS volumes of an EC2 instance to its snapshots, or provide search capability in volumes list.

## Steps to Reproduce (for bugs)

## Context

When I want to alter my CloudFormation Template to restore a volume from a previous snapshot, I have to find the snapshot ID.

## Your Environment

* AWSSDK.Core version used: latest
* Service assembly and version used: latest
* Operating System and version: Windows 10
* Visual Studio version: 2017
* Targeted .NET platform: .Net Core 2.0

## .NET Core Info

* .NET Core version used for development:
* .NET Core version installed in the environment where application runs:
* Output of `dotnet --info`:
* Contents of project.json/project.csproj:

[logging]: http://docs.aws.amazon.com/sdk-for-net/v3/developer-guide/net-dg-config-other.html

The issue names no files or tests; start at the EC2 Instances list and its attached EBS volumes view, then trace how the EBS volumes list displays volume IDs. Done means either navigating from an attached volume to its snapshots or searching the volumes list so the needed snapshot ID can be found for CloudFormation restoration.

Written by the indexing model from the issue text.