Fix check for duplicate sections when editing an existing section. Closes #1635
Fix check for duplicate sections when editing an existing section. Closes #1635

ayellowraven/projectplaten,jurajkapsz/symphony-2,symphonycms/symphony-2,avanteweb/symphony-2,ljonka/symphony-2,thebestsophist/personal-health-diary,twiro/symphony-2,bauhouse/sym-todo-list,jensscherbl/symphony,twiro/symphony-2,blaXXabla/projet_test_symphony,michael-e/symphony-2,alexnantel88/symphony-2,thebestsophist/personal-health-diary,jdsimcoe/symphony-boilerplate,DavidForster/symphony-2,NikoMostWanted/symphony-2,symphonycms/sym-getsymphony,BloodBrother/symphony-2,astudio/remixhair,alexnantel88/symphony-2,mazedigital/jcilearn,BloodBrother/symphony-2,symphonycms/symphony-2,jdsimcoe/symphony-boilerplate,jurajkapsz/symphony-2,avanteweb/symphony-2,NikoMostWanted/symphony-2,jonmifsud/symphony-2,ljonka/symphony-2,brendo/symphony-2,mazedigital/jcilearn,brendo/symphony-2,DeuxHuitHuit/symphony-2,blaXXabla/projet_test_symphony,ayellowraven/projectplaten,johnpuddephatt/symphony-2,astudio/remixhair,johnpuddephatt/symphony-2,michael-e/symphony-2,jonmifsud/symphony-2,symphonycms/sym-getsymphony,mazedigital/jcilearn,bauhouse/sym-todo-list,DavidForster/symphony-2,roshinebagha/Symphony-Test,roshinebagha/Symphony-Test,jdsimcoe/symphony-boilerplate,jensscherbl/symphony,wastemobile/Symphony2.3.6,wastemobile/Symphony2.3.6,DeuxHuitHuit/symphony-2,jdsimcoe/symphony-boilerplate