feat: update version switch button styles and add warning box styling

Author: imantsk

src/css/settings.scss

@@ -148,11 +148,30 @@ body.js {
 	}
 
 	#switch-version-btn {
-		margin-inline-start: 8px;
-		
 		&[disabled] {
 			opacity: 0.6;
 			cursor: not-allowed;
+			background-color: #f0f0f1 !important;
+			color: #a7aaad !important;
+			border-color: #dcdcde !important;
+		}
+	}
+	
+	// Warning box styling
+	#version-switch-warning {
+		margin-top: 20px !important;
+		padding: 12px 16px;
+		border-left: 4px solid #dba617;
+		background: #fff8e5;
+		border-radius: 4px;
+		
+		p {
+			margin: 0;
+			color: #8f6914;
+			
+			strong {
+				color: #8f6914;
+			}
 		}
 	}
 
@@ -165,16 +184,6 @@ body.js {
 		}
 	}
 
-	p.description {
-		font-style: italic;
-		color: #d63638;
-		background: #fcf0f1;
-		padding: 8px 12px;
-		border-radius: 4px;
-		border-left: 4px solid #d63638;
-		margin-block-start: 16px;
-	}
-
 	.notice {
 		&.notice-success {
 			border-left-color: #00a32a;