Make show query button work for v1

[vera-liu]

Problem:

• we replaced query in state with queryResponse in https://github.com/airbnb/superset/pull/2005, then pass query instead of slice to DisplayQueryButton in https://github.com/airbnb/superset/pull/1948. (The reason was that query was sent back to ChartContainer after slice rendering is done, by the time we don't want to change mock slice object but want to change query) However in v1 the query is still stored in the slice object

Solution:
this is a temporary hack to get query button working for v1, the bug should be automatically resolved after v1 deprecation.

Before:

After:

@ascott

[ascott]

🥇