Undefined variables

Hello Damian,

I have my Concrete5 environment set to report also undefined variables etc.
When I run your great add-on for the first time many things were broken on my side because of this.

Please find some updates to the code whenever I found a problem with undefined stuff.

Moreover, I found one CSS property very intrusive to my custom theme - it was ruining the fonts.
Maybe entire part where you are resetting CSS is not an ideal solution? IMO this should be up to the theme.

Best regards,
G.