After sending the interrupt request the application will continue to
the next line of JavaScript and only interrupt then. There is no way
to interrupt the application via the JS debugger as long as no JS
engine is active.

The downside of this is that the pause/continue/stop icons are disabled
until the application actually interrupts. The user might not
understand this.

Change-Id: I355de52f65898d6bdcd437675adba368662f3c13
Task-number: QTCREATORBUG-16646
Reviewed-by: hjk <hjk@qt.io>