Add source-page search (ang panaa vaar kabit)

[bhajneet]

As per Interpret Search Better #395 , we need to allow latin and gurmukhi chars to both search the same pages. So 14, ੧੪, १४, etc. all show the same results. No need for special char at the start. A numbers only search should search pages and in the future can include other results too if needed.

Results should be based on the source. So in Sri Guru Granth Sahib ji results it should say "Ang" or in Sri Dasam Granth "Panaa". In vaaran bhai gurdaas ji it should say "Vaar 14". For Kabit savaiye it should say "Kabit 14". And then show the source name following a comma or in parentheses if source name is not enabled in metadata Related to #225.

In navigator the last line when normally activating "next shabad", it should activate "next page" or pannaa/ang/vaar/kabit, etc. of the source.