To redesign button Edit

[KhrystynaHarasym]

As an Admin I want to see redesigned button Edit on Material page so that I could change material

Preconditions:
Registered User is logged in
Registered User has Admin role
Admin opened Material page
Button is displayed on every Material Page (Article, Post, Video etc.)

Acceptance criteria:
Admin should be able to change material by pressing the button Edit.
The button Edit functionality does not change (pressing the button Edit opens the Editing page with prefilled Material).
The size of button Edit is enlarged in 1,5 times