Click multiple times on sidebar

[nhducit]

After click multiple time on sidebar, I got this issue:

Infomation:

Browser: Firefox version 34.0
OS: Windows 7

[ThomasBurleson]

As reported by @blackhole16

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When clicking very fast and intensely on buttons, one of the animation-circles will stay on the button until reloading the page.

How to redo:

• Open any page with an angular-material button
• click that button very fast and a lot, until one of the circles stays and doesn't vanish

[ThomasBurleson]

The best resolution to these issues is a re-architecture effort for mdRipples. Planned for 0.10.

[ThomasBurleson]

Pending fixes with #3952.