Navigation refactoring, handling extension page params (#1651)

* decentralizing page url-params management -- PoC / tsc 4.1 random fixes

Signed-off-by: Roman <ixrock@gmail.com>

* fixes, tweak example-extension for demo

Signed-off-by: Roman <ixrock@gmail.com>

* lint fixes, revert tests

Signed-off-by: Roman <ixrock@gmail.com>

* removed occasional changes related to typescript 4.1

Signed-off-by: Roman <ixrock@gmail.com>

* updated example with 2 menu-items targeting same page with different params

Signed-off-by: Roman <ixrock@gmail.com>

* fix: merge page url chunks with native URL()-api, simplified default page-params registration

Signed-off-by: Roman <ixrock@gmail.com>

* fix: make lint happy

Signed-off-by: Roman <ixrock@gmail.com>

* fix: unit-tests

Signed-off-by: Roman <ixrock@gmail.com>

* renaming by jim's request: UrlParam => PageParam (type), createUrlParam => createPageParam (helper)

Signed-off-by: Roman <ixrock@gmail.com>

* fix: reverting NamespaceStore public-api breaking changes

Signed-off-by: Roman <ixrock@gmail.com>

* lint fix

Signed-off-by: Roman <ixrock@gmail.com>

* fine-tuning

Signed-off-by: Roman <ixrock@gmail.com>

* yes, lint always unhappy

Signed-off-by: Roman <ixrock@gmail.com>

* fix build

Signed-off-by: Roman <ixrock@gmail.com>

* small fixes

Signed-off-by: Roman <ixrock@gmail.com>

* fix merge-conflicts

Signed-off-by: Roman <ixrock@gmail.com>

* removed `isSystem` page-param's init field exposed to extensions-api

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/icon/icon.tsx

@@ -114,7 +114,13 @@ export class Icon extends React.PureComponent<IconProps> {
 
     // render icon type
     if (link) {
-      return <NavLink {...iconProps} to={link}/>;
+      const { className, children } = iconProps;
+
+      return (
+        <NavLink className={className} to={link}>
+          {children}
+        </NavLink>
+      );
     }
 
     if (href) {