Orders List: Improving Error Handling

[jleandroperez]

Details:

In this PR we're:

• Removing the Orders List "Error Overlay" (which was being displayed whenever Sync failed)
• Implementing a super cool Notice, which will show up on top of the tabBar, and will let users retry the Sync OP.

cc @bummytime @mindgraffiti (Thanks in advance!!!)
Closes #286

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Scenario: Placeholder

1. Fresh install the app
2. Log into your Woo Store
3. Open the Orders tab
4. Verify the Skeleton shows up while the orders are loaded.

Scenario: Empty / Filtered

1. Check out the latest commit of this PR
2. Log into your Woo Store
3. Open the Orders tab
4. Filter by Order Status (and select a status that has no visible orders)
5. Verify the Empty State / Filtered UI shows up
6. Press the Remove Filter button
7. Verify the unfiltered results show up

Scenario: Empty State / Unfiltered

1. Check out this commit: ff3772d
2. Log into your Woo Store
3. Open the Orders tab
4. Verify that the Empty State UI shows up.
5. Press the Action Button
6. Verify that your Store shows up in a WebView

Scenario: Error Notice

1. Check out this commit: 3546d24
2. Log into your Woo Store
3. Open the Orders tab
4. Verify the Error State is Onscreen
5. Press the Retry button
6. Verify shortly after the error screen shows up again

[mindgraffiti]

✅ Skeleton placeholder
✅ Empty / filtered
❔ Empty / unfiltered - the main screen is correct, but should the "Unable to refresh" notice be popping up?

✅Error notice

[mindgraffiti]

Almost there! First two test items working as expected. Last two are giving unexpected results, see screenshots in main comment.

[mindgraffiti]

Re-tested. The 3rd test was happening because I have an edge case for a shop.

My edge case shop: hellotesters.blog
Shows an error with the empty store messaging:

...because that site used to have an active installation of the WooCommerce plugin. I haven't done any updates to the plugin and it's been deactivated (and somehow erased?) from the site.

All that to say, thanks @jleandroperez and 💯

[bummytime]

Looks and works great @jleandroperez !

[jleandroperez]

Thank you both!!!