fix(tooltip): remove tooltip component after it's parent destroyed

[gucheen]

fix #1111

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[gucheen]

I signed it!

[googlebot]

CLAs look good, thanks!

[jelbourn]

@gucheen could you add a unit test for this?

[gucheen]

Unit test has been added, but there was something wrong with the test scripts. 'gulp' was missing in travis.

[jelbourn]

@andrewseguin this may be obsolete based on your animation change, thoughts?

[andrewseguin]

Change looks good for me, thanks for adding the test. This is an issue even with animation included.

[jelbourn]

LGTM

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