Warn users when they approve share requests with Write/Modify permissions

[petrkalos]

Currently the share view indicates the requested permissions but given that customers are used to Read-only nature of data.all it might be good to implement a warning mechanism to increase awareness.

My suggestions, first one is much simpler to implement but the second is more assertive.

1. Only for Write/Modify share requests display a sizeable warning as a subheader in the ShareView

2. Only for Write/Modify share requests create a confirmation pop-up when clicking the Approve button