D13366: Add SignatureEdit widget for FormFieldSignature

[Chinmoy Ranjan Pradhan]

chinmoyr added a dependent revision: D14816: Add signature panel.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D13366

To: chinmoyr, aacid
Cc: okular-devel, ngraham, aacid