'' is no longer a special value for Workflow Activities, that will cause them to pull their defaultValue. Instead, only undef will do that. Fixes bug #11900

docs/changelog/7.x.x.txt

@@ -5,6 +5,7 @@
  - fixed #11773: Form injection in the EMS event ordering code.
  - fixed #11773: SQL injection vulnerability in Edit Thing form processing code.
  - fixed #11906: Carousel slide height problems
+ - fixed #11900: Request Approval for Version Tag Workflow activity can't select --Continue with this workflow
 
 7.10.2
  - fixed #11884: Editing Templates impossible / Code editor not loaded

lib/WebGUI/Workflow/Activity.pm

@@ -315,7 +315,7 @@ sub new {
 	my %data = (%{$main}, %{$sub});
     for my $definition (reverse @{$class->definition($session)}) {
         for my $property (keys %{$definition->{properties}}) {
-            if(!defined $data{$property} || $data{$property} eq '' && $definition->{properties}{$property}{defaultValue}) {
+            if(!defined $data{$property}) {
                 $data{$property} = $definition->{properties}{$property}{defaultValue};
             }
         }