Move SCSS property definition (#1633)

This PR cleans up the SCSS language definition a little by moving the
definition of `property` inside the `extend` object. Also remove useless `i` flag.

Author: RunDevelopment

components/prism-scss.js

@@ -30,6 +30,12 @@ Prism.languages.scss = Prism.languages.extend('css', {
 			'placeholder': /%[-\w]+/,
 			'variable': /\$[-\w]+|#\{\$[-\w]+\}/
 		}
+	},
+	'property': {
+		pattern: /(?:[\w-]|\$[-\w]+|#\{\$[-\w]+\})+(?=\s*:)/,
+		inside: {
+			'variable': /\$[-\w]+|#\{\$[-\w]+\}/
+		}
 	}
 });
 
@@ -43,13 +49,6 @@ Prism.languages.insertBefore('scss', 'atrule', {
 	]
 });
 
-Prism.languages.scss.property = {
-	pattern: /(?:[\w-]|\$[-\w]+|#\{\$[-\w]+\})+(?=\s*:)/i,
-	inside: {
-		'variable': /\$[-\w]+|#\{\$[-\w]+\}/
-	}
-};
-
 Prism.languages.insertBefore('scss', 'important', {
 	// var and interpolated vars
 	'variable': /\$[-\w]+|#\{\$[-\w]+\}/