Maunal test for #10689

case 1: two textareas

Expected behavior:

• when content of any editor is empty submit buttons and both save buttons should show error dialog,
• when both editors have content submit button and both save buttons should send content of BOTH editors,

case 2: textarea and one input[name=submit]

Expected behavior:

Input with name=submit overwrites submit function so:

• both save buttons should not work but there should be NO ERRORS,
• submit button should work as in case 1,

case 3: textarea and two inputs[name=submit]

Expected behavior:

Everything should works as in case 2.

case 4: inline textarea

Expected behavior:

Submit button should send content of both textareas (event if they are empty).