Enhance/time sync warning

[smk762]

closes https://github.com/KomodoPlatform/komodo-wallet-desktop/issues/1857

To test:
A

• login, then modify your system time to be out of sync by a couple of minutes.
• Dex tab in sidebar should become disabled, and show a tooltip when hovering over
• If on dex page, it should kick you to portfolio page

B

• set your system time back to correct global time
• Dex tab in sidebar should once again be active

[cipig]

works as expected