add a background to slick carousels

ot_templating/Resources/Public/assets/style/common/module/_carousel.scss

@@ -30,6 +30,7 @@ header .slick-track {
 
 // vertically center
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items:center;
 }

ot_templating/Resources/Public/assets/style/style.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-blue.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-green.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-grey.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-light-blue.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-light-red.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-orange.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-purple.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }

ot_templating/Resources/Public/assets/style/theme-red.css

@@ -588,6 +588,7 @@ header .slick-track {
 }
 
 .content .slick-slide {
+  background-color: #f2f2f2;
   display: flex;
   align-items: center;
 }