Currently both read and write operations look the same in the list.

Example

Here we can see that flip is a write operation, as it mutates the storage. It will broadcast an extrinsic and won't return any data other than the consumed weight.

On the other hand, the get is an actual call that does not cost any fee and returns the value of the boolean stored in the contract.

I propose to differentiate them by:

1. Placing an icon/emoji on the left depending on whether it's a read or write operation.
2. Showcasing at the beginning of the right-most description of the call that, in case of a write operation, it will cost fee (or simply that it is a write operation).