Improve Journal page navigability

[StephDriver]

Description

from #338

• on the Journals page, journals are listed alphabetically, but with no way to jump to a particular one. Especially an issue on mobile, as is it a long scroll.

Further, there is a disconnect between the description that journals can be filterred by keyword and subject area, and the location of that filter

Having read that "Journals can also be filtered by keyword and subject area." at the bottom of the orange block, one has to look back up to above the block to find the filter in question. The description of the purpose of this filter is thereby removed from the filter itself. The filter ends up without context.

Tasks

• Ensure filter has context - for example locating the filter below the orange block instead of above it, or remove the filter description from the orange block and place with the filter itself.

Moved to separate issue

• Provide simple page navigation for the list of journals #400