adblockplusopera: Port UI code from Chrome

button.js

Index: button.js
===================================================================
deleted file mode 100644
--- a/button.js
+++ /dev/null
@@ -1,50 +0,0 @@
-const button = {
-	update: function(url) {
-		var url = opera.extension.tabs.getSelected().url;
-		if(url) {
-			if(whitelist.check(url))
-				buttonElement.icon = '/images/icon18.png';
-			else
-				buttonElement.icon = '/images/icon_green18.png';
-		}
-		else
-			buttonElement.icon = '/images/icon_yellow18.png';
-	},
-	click: function() {
-		this.update();
-	},
-	enable: function() {
-		preferences.bool('button', true);
-		this.display();
-	},
-	disable: function() {
-		preferences.bool('button', false);
-		opera.contexts.toolbar.removeItem(buttonElement);
-		
-		opera.extension.windows.removeEventListener('focus', button.update, false);
-		opera.extension.tabs.removeEventListener('focus', button.update, false);
-		window.clearInterval(button.update, 1000);
-	},
-	status: function() {
-		return preferences.bool('button');
-	},
-	display: function() {
-		if(this.status()) {
-			this.update();
-			opera.contexts.toolbar.addItem(buttonElement);
-			
-			opera.extension.windows.addEventListener('focus', button.update, false);
-			opera.extension.tabs.addEventListener('focus', button.update, false);
-			window.setInterval(button.update, 1000);
-		}
-	}
-};
-var properties = {
-	disabled: true,
-	icon: '/images/icon18.png',
-	title: translate.get('ext_name')
-};
-var buttonElement = opera.contexts.toolbar.createItem(properties);
-buttonElement.addEventListener('click', button.click(), false);
-
-button.display();