Error message obstructs the editor

[avinashpandeshwar]

Error message obstructs the editor, if the error is in the last line. Happens both on and off full screen.

Steps to reproduce:

1. Browse to the URL https://jsoncompare.com/#!/simple/
2. Paste a multi-line JSON into the editor.
3. Introduce an issue in the last line. Either delete the last "]" or "}".
4. Click on "Lint".