fix(dropdown): prop disabled renamed to isDisabled (#615)

BREAKING CHANGE:
* dropdown property `disabled` renamed to `isDisabled`

Author: erashu212

components/dropdown/dropdown-toggle.directive.ts

@@ -11,7 +11,7 @@ const MouseEvent = (global as any).MouseEvent as MouseEvent;
 @Directive({selector: '[dropdownToggle]'})
 export class DropdownToggleDirective implements OnInit {
   @HostBinding('class.disabled')
-  @Input() public disabled:boolean = false;
+  @Input() public isDisabled:boolean = false;
 
   @HostBinding('class.dropdown-toggle')
   @HostBinding('attr.aria-haspopup')
@@ -37,7 +37,7 @@ export class DropdownToggleDirective implements OnInit {
   public toggleDropdown(event:MouseEvent):boolean {
     event.stopPropagation();
 
-    if (!this.disabled) {
+    if (!this.isDisabled) {
       this.dropdown.toggle();
     }
     return false;

components/dropdown/readme.md

@@ -35,7 +35,7 @@ export class Dropdown implements OnInit, OnDestroy {
 @Directive({ selector: '[dropdownToggle]' })
 export class DropdownToggle implements OnInit {
   @HostBinding('class.disabled')
-  @Input() public disabled:boolean = false;
+  @Input() public isDisabled:boolean = false;
 
   @HostBinding('attr.aria-expanded')
   public get isOpen() {}
@@ -60,4 +60,4 @@ export const DROPDOWN_DIRECTIVES: Array<any> = [Dropdown, DropdownMenu, Dropdown
 - `onToggle` - fired when `dropdown` toggles, `$event:boolean` equals dropdown `isOpen` state
 
 ### Dropdown toggle properties
-- `disabled` (`?boolean=false`) - if `true` dropdown toggle will be disabled
+- `isDisabled` (`?boolean=false`) - if `true` dropdown toggle will be disabled