fix(Layout): Prevent Layout from replacing [\"] (backslash dquot) sequences (refs #4970)

Layout was replacing occurrences of the string [\"] (backslash dquot)
with ["] (dquot), thus corrupting some texts on edition.
Merge pull request #1268 from eguaj/3.2-A4970

fix(Layout): Prevent Layout from replacing [\"] (backslash dquot) sequences (closes #4970)