update docs

docs/50_Components/Callout.md

@@ -24,6 +24,7 @@ Key      | Description
 ---      | ---
 class    | optional: additional css classes
 type     | one of [none]\|danger\|dark\|info\|primary\|secondary\|success\|warning
+shadow   | size of shadow; one of [none] (=default: between small and regular)|none|small|regular|large
 
 Content:
 

docs/50_Components/Card.md

@@ -27,6 +27,7 @@ Key      | Description
 class    | optional: additional css classes
 type     | one of [none]\|danger\|dark\|info\|primary\|secondary\|success\|warning
 variant  | kind of coloring: one of<br>- "default"  - titlebar is colored<br>- "outline" - a small stripe on top border is colored<br>- "solid"    - whole card is colored<br>- "gradient" - whole card is colored with a gradient
+shadow   | size of shadow; one of [none] (=default: between small and regular)|none|small|regular|large
 state    | window state. one of [none]\|collapsed\|maximized
 
 Toolbar icons: