Serials Docs: Improve format, fix typos, and update

This commit makes several minor changes to the Serials doc files, mostly
changes in formatting or corrections of bugs/typos. This list covers
most of the changes:

    - Add row on 'receiving' to Serials interfaces comparison table
    - Improve formatting of actionable items (using bold and arrows),
      e.g. Click on *First Menu* -> *Next Menu* -> *Last Menu*
    - Standardize formatting of form field names (using italics)
    - Improve unclear wording
    - Correct an outdated description of copy template 'status' field
      (changed before 2.3)
    - Change heading level for a subsection

Signed-off-by: Remington Steed <rjs7@calvin.edu>
Serials Docs: Update for new features in 2.5

This commit adds a "Notes" section to the chapter on Receiving, including
a subsection on using the new "alerts" feature in the receiving interface.
It also adds a new screenshot for the "Notes" section and updates two
screenshots that have changed in 2.5. Finally, this commit updates the
Serials Copy Template doc to reflect the new 2.5 Floating Groups feature.

Signed-off-by: Remington Steed <rjs7@calvin.edu>
Docs 2.5: Fix floating groups heading level (2nd try)

The first attempt successfully pushed the Floating Groups chapter to
its proper place in the table of contents, but it also mistakenly pushed
many following chapters down one heading level. This commit follows the
approach already common in the root.txt file, and also undoes the
previous approach of shifting the heading level within the chapter file
itself. I suspect the previous approach only failed because it lacked a
blank line before the final 'leveloffset' command, but this new
approach is better because it is already in common use.

Signed-off-by: Remington Steed <rjs7@calvin.edu>
RDA / TPAC: Add 264 for pubinfo graphic 880 lookups

Per https://bugs.launchpad.net/evergreen/+bug/1243746 the publication
info in search results was coming up empty for RDA records because they
use 264 for publication info instead of 260.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Ben Shum <bshum@biblio.org>