Changed Object browser logic to work with websockets (#2419)

fixes https://github.com/minio/console/issues/943

## What does this do?

This allows us to start streaming results to the list instead of waiting
to retrieve all the objects list before sending it to the client

Included a couple of fixes:

- Removed metadata for deleted items
- Fixed multiple metadata requests
- Fixed height grow for parent wrapper
- Fixed object reload after restore version


Signed-off-by: Benjamin Perez <benjamin@bexsoft.net>

models/rewind_item.go

@@ -40,6 +40,9 @@ type RewindItem struct {
 	// delete flag
 	DeleteFlag bool `json:"delete_flag,omitempty"`
 
+	// is latest
+	IsLatest bool `json:"is_latest,omitempty"`
+
 	// last modified
 	LastModified string `json:"last_modified,omitempty"`