Pauses the download. If paused, the default download dialog shows that the
download is paused. No effect if download is already paused. Pausing a
download changes the state to COREWEBVIEW2_DOWNLOAD_STATE_INTERRUPTED
with InterruptReason set to COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_USER_PAUSED.
Pauses the download. If paused, the default download dialog shows that the download is paused. No effect if download is already paused. Pausing a download changes the state to COREWEBVIEW2_DOWNLOAD_STATE_INTERRUPTED with InterruptReason set to COREWEBVIEW2_DOWNLOAD_INTERRUPT_REASON_USER_PAUSED.