Fix tabindex on edit summary

Per https://vndb.org/t5864
Fix search tabs query string appending on back button

As reported in https://vndb.org/t5868
Disable warning about switch statement

I really want to rewrite that code to not use the very unperlish switch
statement, but the code is rather... complex and hairy. :(
Use TUWF's reqBaseURI() instead of $self->{uri} on site links

TUWF properly detects HTTPS and includes this in the returned URL, so
this change ensures that all URLs adopt properly to HTTP and HTTPS.