Add and update group names in the content files

[godnondsilva]

Problem In the sidebar, going to the RTL, Number Input and Search Input, the pages wouldn't turn blue (referring to current page).

Screenshots

1. Page URL
2. Sidebar

Expected Result The page names should be blue when the page name matches the route.

Solution Add and update the group names in the content files as follows:

1. The RTL page should have group param with customize.
2. The Number Input and Search Input pages should have forms instead of components.

@zoltanszogyenyi Please review.

[zoltanszogyenyi]

Hey @godnondsilva - good catch, thanks for the PR! Merged.