pinLabel property needed to edit the content of the pin and a prop needed to keep the pin expanded

[packman500]

Description

pinLabel property needed to edit the content of the pin, i saw a pull request for #133, but it was not merged. A prop needed to keep the pin expanded, The expand property is readOnly so i am unable to keep the pin open.

Tried this to keep the pin expanded but no joy, **this.shadowRoot.querySelector('#applicablePeriodSliderId').$.sliderContainer.class = 'pin snaps expand' ** is there any way to achieve this ?

Expected outcome

1. We should be able to customise the label on the pin.
2. The pin stays expanded so we can show the value selected on the UI

Actual outcome

no properties available to customise the label of the pin

Live Demo

Steps to reproduce

Browsers Affected

• [ ] Chrome
• [ ] Firefox
• [ ] Safari 9
• [ ] Safari 8
• [ ] Safari 7
• [ ] Edge
• [ ] IE 11
• [ ] IE 10