This changes the output of `/catalog/search` as follows:
- Entire search query (rather than only the value of the `q` parameter)
is put in the <title> node.
- Search performed with an empty query presents itself as "All zims".
- The feed id remains stable for identical searches on the same
library.
/catalog/v2/entries is intended to play the combined role of
/catalog/root.xml and /catalog/search of the old OPDS API. Currently,
the latter role is not yet implemented.
Implementation note: instead of tweaking and reusing
`OPDSDumper::dumpOPDSFeed()`, the generation of the OPDS feed is done via `mustache`
and a new template `static/catalog_v2_entries.xml`.
Note: This commit somewhat relaxes validation of non variable
`<updated>` elements in the OPDS feed - the contents of any `<updated>`
element is replaced with the YYYY-MM-DDThh:mm:ssZ placeholder.
In certain pages like the search result page, bookName is not of the
form `/bookName/endpoint?parameters`. Rather it is available as a query
parameter. From these pages bookName should be assigned from parameters.
Since the `value` field of the search suggestion results is HTML
escaped/encoded in the backend (see static/templates/suggestion.json) it
must be decoded in the frontend.
taskbar is placed *above* content using a `padding-top: 3em;` rule
Currently, in regular case, padding-top is too large and leaves ~4/5px between the
taskbar and the content.
This fixes it by using a `calc()` rule to eliminate this extra space
