analysis.lami: Add toolbar to custom charts

analysis.lami: Add toolbar to custom charts

For now only a close button action is present. This will
allow removing a single chart, and not all of them.

Bug: 493941

Change-Id: I24c8ee2d64bc9e8da93788f34f380bda4e7a88b8
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Reviewed-on: https://git.eclipse.org/r/72244
Reviewed-by: Hudson CI
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Alexandre Montplaisir <alexmonthy@efficios.com>