Display of deleted tablets on all pages with tablets

[vporyadke]

In this example we have 1 alive and 447 deleted tablets on a node

On Nodes tab:

1. Deleted tablets should be gray or some other color, but not green

On detailed Tablets page:

2. Generation 0xffffffff is not a valid value, and should not be displayed as such
3. Deleted tablets are not up, they should not have uptime
4. There should not be an active button to restart a deleted tablet.