Fix: proper sorting resources by age column (#2182)

* - fix: proper sorting for resource age column
- use Date.now() instead of new Date().getTime() (#2141 follow-up)

Signed-off-by: Roman <ixrock@gmail.com>

* fix: proper bar-chart tooltip callback

Signed-off-by: Roman <ixrock@gmail.com>

* fix: sorting in cronjobs, more Date.now() replacements

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/+nodes/nodes.tsx

@@ -150,7 +150,7 @@ export class Nodes extends React.Component<Props> {
             [columnId.conditions]: (node: Node) => node.getNodeConditionText(),
             [columnId.taints]: (node: Node) => node.getTaints().length,
             [columnId.roles]: (node: Node) => node.getRoleLabels(),
-            [columnId.age]: (node: Node) => node.metadata.creationTimestamp,
+            [columnId.age]: (node: Node) => node.getTimeDiffFromNow(),
             [columnId.version]: (node: Node) => node.getKubeletVersion(),
           }}
           searchFilters={[