Before saving the form, pull the latest PDF settings and store with the object

[jakejackson1]

Description

This helps to prevent PDF settings being overridden when the form editor is saved.

Resolves #1464

Screenshots

Checklist:

• [x] I've tested the code.
• [x] My code is easy to read, follow, and understand
• [ ] My code follows the accessibility standards.
• [x] My code has proper inline documentation / docblocks.

Additional Comments

[codecov[bot]]

Codecov Report

Merging #1465 (293e101) into development (282780d) will increase coverage by 17.53%. Report is 1 commits behind head on development. The diff coverage is n/a.

:exclamation: Current head 293e101 differs from pull request most recent head 0e82927. Consider uploading reports for the commit 0e82927 to get more accurate results

@@                Coverage Diff                 @@
##             development    #1465       +/-   ##
==================================================
+ Coverage          75.77%   93.30%   +17.53%     
==================================================
  Files                243       57      -186     
  Lines              12834     1464    -11370     
  Branches             370      370               
==================================================
- Hits                9725     1366     -8359     
+ Misses              3101       90     -3011     
  Partials               8        8               

see 186 files with indirect coverage changes