HP Improvements

- Add scroll bar into the tab content in protocolEditor
- Prevent "Wt." and "Req." fields to go out of screen when constraint value is long
- Add "starts with" and "ends with" comparators
- Fix the issue with empty input value in ruleEntryDialog

Packages/ohif-hanging-protocols/client/components/protocolEditor/protocolEditor.styl

@@ -79,6 +79,10 @@ $height = 20px
     background: #ffffff
     color: #3e3e3e
 
+  .tab-content
+    height: calc(100% - 60px)
+    overflow: auto;
+
   .protocolEditorSection
     padding: 10px
     margin: 10px 0