Merge in changes.

Adds text level block controls for alignment.

…elop

Resolve confilcts.

Revert text alignment to be in sync with main repo.

Revert stuff.

The usage of apend strings was causing a bug where the same class was added N times as the element
was selected so in order to prevent this we can just make a switch to the functions provided by
classList with the same behavior:

- add
- remove

This change uses a new line instead of the second argument to add a new class, because the multiple
paremeters is not supported on IE 10.

Previously add was not reseting to the original state of each block.

…align-block-controls

…bles headings, and paragraphs to properly change from left aligned, to center, or right aligned. The CSS currently only supports paragraphs, headings 1-6, and blockquote HTML elements.

Use classlist instead of appending and removing class names

…bles headings, and paragraphs to properly change from left aligned, to center, or right aligned. The CSS currently only supports paragraphs, headings 1-6, and blockquote HTML elements.

…bles headings, and paragraphs to properly change from left aligned, to center, or right aligned. The CSS currently only supports paragraphs, headings 1-6, and blockquote HTML elements.