EGO-L-002 warning

objects created by extension should be destroyed in disable()

Objects assigned in `enable()` are missing matching `.destroy()` calls in `disable()` or its helper methods.

Destroy all objects

• extension.js:52

              this._nextBtn = new St.Button({
                  style_class: 'button', can_focus: true, x_expand: true,
                  child: new St.Icon({ icon_name: 'media-seek-forward-symbolic', icon_size: 16, x_align: Clutter.ActorAlign.CENTER })
              })

• extension.js:40

              this._prevBtn = new St.Button({
                  style_class: 'button', can_focus: true, x_expand: true,
                  child: new St.Icon({ icon_name: 'media-seek-backward-symbolic', icon_size: 16, x_align: Clutter.ActorAlign.CENTER })
              })

• extension.js:46

              this._removeBtn = new St.Button({
                  style_class: 'button', can_focus: true, x_expand: true,
                  child: new St.Icon({ icon_name: 'edit-delete-symbolic', icon_size: 16, x_align: Clutter.ActorAlign.CENTER })
              })