Set frontPageMessageHtml and afterVoteMessageHtml both as text fields rather than VARCHAR(255); commit synced with https://github.com/cusu/bob-gui/commit/d724a3adafaba38e5724e5d5ede19169d16819f0 and https://github.com/cusu/bob/commit/90cf8e060b4942c61c732341d3a2f7059a623aad