Addition of some new options that user can control

### feedbackButton (String)

Define a custom button instead of the default button that appears on the lower right corner.

`Default: .feedback-btn`

### showDescriptionModal (Boolean)

Sets whether the next modal for entering description should appear or not

`Default: true`

### onScreenshotTaken (Function)

A callback function to be called when clicking on take screenshot button. The callback function's prototype is `function(post)`

`Default: {}`

### isDraggable (Boolean)

Sets whether the user will be able to drag the feedback options modal or not

`Default: true`