clicking on a reporter removed from a stack can run that stack

[cwillisf]

Expected Behavior

When a reporter is not connected to any other blocks, clicking on it should visually report its value.

Actual Behavior

If a reporter was previously connected to a block's input, clicking on it can run the block it was connected to.

Steps to Reproduce

1. Build the stack shown in the first screenshot below
2. Click on the "my variable" reporter to run the stack (correct behavior)
3. Pull the "my variable" reporter out, as shown in the second screenshot below
4. Click on the "my variable" reporter

Expected: a small speech bubble showing "30"
Actual: the sprite rotates by 1 degree

Screenshots

Step 1:

Step 3: