Search widget time range zoom should be disabled for the aggregation builder

All search widgets which display a time axes allow changing the absolute time range, by zooming the chart. This changes the absolute time range of the current search.

This is also possible, when editing the chart. I suggest to disable the zoom inside the aggregation builder. The user should not be able to unintentionally change a setting of something outside the modal.

## Steps to Reproduce (for bugs)
1. Open the search page
2. Create a chart (e.g. bar chart)
3. Configure a timestamp row pivot
4. Use the chart zoom functionality inside the edit modal / aggregation builder

## Your Environment
* Graylog Version: 3.2.0-beta.4-SNAPSHOT