GPII-736: Fixing save and apply button
GPII-736: Fixing minus and plus buttons for NVDA screen reader
GPII-736: Fixing the checkboxes for "more settings" in screen reader
region. 
All checkboxes are pronounced correctly by JAWS and NVDA screen readers.
GPII-736: Adding german and spanish for plus and minus text.
GPII-736: Adding german and spanish plus and minus text for
magnification adjuster.
GPII-736: Fixing aria-label for plus and minus labels.
Remove gpii-hide-element from adjusters css file.
GPII-736: Delete tabindex attribute from plus and minus labels.
GPII-736: Removing duplication for plus and minus labels.
Code migration about plusText and minusText to
gpii.adjuster.textfieldStepper.
Removing tabindex from textfields.
Merge pull request #72 from dimokas/GPII-736

Thanks for the review, Justin