Add missing dependency.

pom.xml

diff --git a/pom.xml b/pom.xml
index 954fbd2..761981f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -66,6 +66,11 @@
 			<artifactId>activity-tools</artifactId>
 			<version>${t2.ui.api.version}</version>
 		</dependency> -->
+		<dependency>
+			<groupId>net.sf.taverna.t2.ui-api</groupId>
+			<artifactId>activity-tools</artifactId>
+			<version>${t2.ui.api.version}</version>
+		</dependency>
 	</dependencies>
 	<repositories>
 		<repository>