Expected Behavior

Since invocations above 10 GAS are no longer free, users should be made aware of the fee when sending an invocation.

Current Behavior

The invocation dialogue is currently not displaying any fees when reviewing real invocations.

Possible Solution

Before sending a real invocation, the client should do a testinvoke, then display the fee information and the "expected output" retrieved from the test invocation in the invocation confirmation dialogue.
In the case they fee is <=10 GAS, set displayed fee to "free".
In the case it's >10 GAS, display total GAS fee - 10 as the displayed fee.