Update drop zones to not change hight on drag over.

src/assets/sass/general.scss

@@ -95,17 +95,13 @@ body {
 }
 
 .cdk-drag-placeholder {
-	position: relative;
-	&:after {
-		content: '';
-		position: absolute;
-		top: 0;
-		right: 0;
-		bottom: 0;
-		left: 0;
-		background-color: #C7CACB;
-		border-radius: 5px;
-	}
+    position: relative;
+    opacity: 0;
+    height: 0;
+}
+
+.course-wrapper:not(.cdk-drag-preview) {
+    transform: translate(0) !important;
 }
 
 .cdk-drag-preview {