Implement setPinned for Control Flow View

Implement setPinned for Control Flow View

When pinned the control flow view does not scroll/seek on position change, trace
change, and its filters do not change.

Also:
- Ignores all outbound and inbound signalling.
- Disables all modifiers of the visible time range windows.
- Disables time based scrolling/seeking (horizontal scrolling).
- Hides the thread presentation menu.
- Changes the tab label to enhance visibility of the pinned state.
- Allows vertical scrolling and expand/collapse operation.

Change-Id: I6bf2329f0f932feba20f06c971a1adb4de940b6c
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>