Instant trade doesn't update market orders on asset buy/sell flip

**Describe the bug**

On the instant trade spotlight page when you change CNY_BTS to BTS_CNY by clicking the middle button:

It doesn't fetch the opposite side of the market.

When you refresh the page it does fetch the correct side of the market.

**To Reproduce**
Steps to reproduce the behavior:

Go to the instant trade page.

Enter an amount of an asset to sell.

View the orders which will be involved in your transaction.

Click the flip asset button between the 2 amount fields.

See that the market orders do not change as expected.

Refresh the page, see that the new order of assets has affected the market orders list correctly.

**Expected behavior**

When you flip CNY_BTS to BTS_CNY you're given the other side of the market immediately.

**Desktop (please complete the following information):**

bts.exchange

Start by reproducing the issue on the instant trade page: enter a sell amount, inspect the market orders, then click the flip asset button. Trace how the flip changes the asset pair and refreshes market orders; done means the opposite side of the market appears immediately without a page refresh.

Written by the indexing model from the issue text.