- Basic implementation

Also restructure files containing interfaces.

Octal characters are deprecated and don't work anymore. This solution 
uses an empty string over the whole line.

#502

#499

- Background color must not be transparent for the stickied panel to 
overlay properly.

- Use TextImagePanel where possible

Toolbar is a single word, therefore any capitalized letters are errors. 
No need to sanitize, since this was broken anyway.

#384

#386

#453

Material update fix

causes problems after update

#452

... to create a new reference for options property.

Measure holds the value and a unit for CSS properties.

- Reformat styles

- Reformat styles