Elements with position: absolute & top properties are positioned incorrectly on sticky deactivation

[roby124]

Elements with CSS property position set to absolute are incorrectly positioned after ng-sticky gets deactivated if top attribute is different than 0.
This is due to the fact that removeSticky() method leaves top property active on previously stickied element (only position property gets removed on deactivation - this.el.nativeElement.style.position = '';).

Example:
Element which holds ng-sticky directive has the following CSS:

position: absolute;
top: 30px;

After sticky deactivation, top property stays active and is set to 0 which places the element in a wrong place.

This pull request solves the problem by removing the whole style attribute upon sticky deactivation.

[vovank86]

I absolutely agree with roby124. This fix is very important for me.
As temporary fix I use !important in my css, but it's wrong way.