Move Chart and Color from the global scope to window.imagify at…

…tributes.

It will prevent conflicts with page builders that also use `Color`, and plugins that use outdated copies of chart.js (`Chart`).

assets/js/admin.js

@@ -1,4 +1,6 @@
-window.imagify = {
+window.imagify = window.imagify || {};
+
+jQuery.extend( window.imagify, {
 	concat: ajaxurl.indexOf( '?' ) > 0 ? '&' : '?',
 	log:    function( content ) {
 		if ( undefined !== console ) {
@@ -20,7 +22,7 @@ window.imagify = {
 
 		jQuery( 'body' ).addClass( 'imagify-modal-is-open' );
 	}
-};
+} );
 
 
 // Imagify light modal =============================================================================

assets/js/bulk.js

@@ -43,7 +43,7 @@
 				return;
 			}
 
-			donuts[ this.id ] = new Chart( this, {
+			donuts[ this.id ] = new w.imagify.Chart( this, {
 				type: 'doughnut',
 				data: {
 					datasets: [{
@@ -91,7 +91,7 @@
 				return;
 			}
 
-			donut = new Chart( this, {
+			donut = new w.imagify.Chart( this, {
 				type: 'doughnut',
 				data: {
 					datasets: [{
@@ -121,7 +121,7 @@
 	}
 
 	if ( overviewCanvas ) {
-		overviewDoughnut = new Chart( overviewCanvas, {
+		overviewDoughnut = new w.imagify.Chart( overviewCanvas, {
 			type:    'doughnut',
 			data:    overviewData,
 			options: {