Pre release tweaks

mobile/src/WorkItem/WorkItem.js

@@ -80,6 +80,10 @@ export class WorkItem extends React.Component {
       isValid: (r, v) => v !== "",
       alwaysGet: true,
     },
+    addActivity: {
+      noValue: true,
+      isDisabled: (r, v) => r.anyModified,
+    },
   }
 
   constructor(props) {
@@ -277,8 +281,8 @@ export class WorkItem extends React.Component {
 
   @autobind
   handleAddActivity() {
-    if (this.history) {
-      this.history.push(`/activity?workItemId=${this.binder._id}`)
+    if (this.props.history) {
+      this.props.history.push(`/activity?workItemId=${this.state.binder._id}`)
     }
   }
 
@@ -375,21 +379,12 @@ export class WorkItem extends React.Component {
           {api.loggedInUser.administrator &&
             binder._id && (
               <View style={styles.panel}>
-                <TouchableOpacity
+                <BoundButton
+                  name="addActivity"
+                  title="Add Activity"
+                  binder={binder}
                   onPress={this.handleAddActivity}
-                  style={{
-                    alignSelf: "center",
-                    backgroundColor: "blue",
-                    justifyContent: "center",
-                    paddingHorizontal: 10,
-                    height: 40,
-                    width: "100%",
-                    backgroundColor: "#3BB0FD",
-                  }}>
-                  <Text style={{ alignSelf: "center", color: "black" }}>
-                    Add Activity
-                  </Text>
-                </TouchableOpacity>
+                />
               </View>
             )}
           {isIphoneX ? <View style={{ height: 30, width: "100%" }} /> : null}