Feature/tci 1101 hero title on image (#826)

* H4 css added for Aside editor config

* Code refactored

* Signature title field added into twig

* Image signature title added

* TCI-1101--Signature title attribute added for Hero banner

* TCI-1101--Added null check for div

* removed z-index for photo attribution text

* Conflicts resolved

* Changed css for Photo attribution

* TCI-1101--background color change

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Co-authored-by: Reshma Dhane <reshmaingavale@gmail.com>

source/_patterns/02-molecules/hero/_hero.scss

@@ -227,6 +227,6 @@ $_config: map-merge-by-keys($_config_schemes, base, $_config_schemes, $scheme);
 .jcc-hero-tiles__side .jcc-signature-bottom-right {
   bottom: 0;
   right: 0;
-  background: rgba(0, 94, 162, 0.7);
+  background: rgba(92, 92, 92, 0.7);
   padding: 0 8px;
 }