Use 'pointer-events:none' for topAnnotationsHolder

- Use 'pointer-events: none' for topAnnotationsHolder.
Fix shift of text area in iOS on keyboard slide

- Fix shift of text area in iOS on keyboard slide.
Forcefully create layer for 'editable_label'

- Create layer for 'editable_label' when there is a call to
  'didCreateLayer' without actual creation of layer.