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Issue Description:
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Carriage return symbols are being deleted from custom message after saving an operation.

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Test Sequence:
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0. Create operation for an action.
1. Configure operation to send message with custom title and custom message (with multiple lines).
2. Press Save in "Edit Operation" box.
3. Press Edit in "Action Operations" box to make sure if message is the same.

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Test Result:
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0. OK.
1. OK (see 1st screenshot).
2. OK (see 2nd screenshot).
3. Not OK! Carriage return symbols were deleted from operation message (see 3rd screenshot).