fix: add tabIndex for material elements (#1047)

[tylerthrash]

Fixed issue #1047 for missing tabIndex implementations for dynamic Material elements.

[codecov-io]

Codecov Report

Merging #1048 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #1048   +/-   ##
============================================
  Coverage        90.49%   90.49%           
============================================
  Files              170      170           
  Lines             2673     2673           
  Branches           247      247           
============================================
  Hits              2419     2419           
  Misses             196      196           
  Partials            58       58

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a963297...135db10. Read the comment docs.