Update Global Extension Settings Management

[jakejackson1]

Description

Fix UI display in GF2.5+ and add new methods for accessing the add-on specific settings.

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 #1419 (a419127) into development (a2f2c31) will decrease coverage by 0.15%. The diff coverage is 56.57%.

@@                Coverage Diff                @@
##             development    #1419      +/-   ##
=================================================
- Coverage          78.29%   78.14%   -0.16%     
- Complexity          2901     2922      +21     
=================================================
  Files                243      243              
  Lines              10119    10182      +63     
  Branches             370      370              
=================================================
+ Hits                7923     7957      +34     
- Misses              2188     2217      +29     
  Partials               8        8              

Impacted Files	Coverage Δ
src/Helper/Helper_Interface_Extension_Settings.php	0.00% <ø> (ø)
src/View/html/Settings/extensions.php	0.00% <0.00%> (ø)
src/View/View_Settings.php	33.33% <13.04%> (-6.46%)	:arrow_down:
src/Helper/Helper_Abstract_Addon.php	77.65% <90.90%> (+2.82%)	:arrow_up:

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