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    - Correct an outdated description of copy template 'status' field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>