webapp/frame editor: fix zoom dropdown (and probably other dropdowns as well) -- #4044
webapp/frame editor: fix zoom dropdown (and probably other dropdowns as well) -- #4044

sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc,sagemathinc/smc,sagemathinc/smc