Sticky headers not working

Problem/Motivation

not properly tested
Sticky headers do not seem to be sticking for me.

Steps to reproduce

* Create a view
* Set Format to Bootstrap Table
* Turn only Sticky Header on under extensions
* Add some fields

Scroll and headers do not stick

Proposed resolution

I am a bit overloaded right at the moment but logging the bug in case anyone else encounters it or I will try to dig into it in the next week or two.

Step 1) test on a clean build
2) test if it is clashing with another module or the theme.

Remaining tasks

User interface changes

API changes

Data model changes