MMVP: Enhance the activities and places library

<!-- https://jarcasting.com/artifacts/org.realityforge.gwt.mmvp/gwt-mmvp/ -->
<dependency>
    <groupId>org.realityforge.gwt.mmvp</groupId>
    <artifactId>gwt-mmvp</artifactId>
    <version>0.15</version>
</dependency>

// https://jarcasting.com/artifacts/org.realityforge.gwt.mmvp/gwt-mmvp/
implementation 'org.realityforge.gwt.mmvp:gwt-mmvp:0.15'

// https://jarcasting.com/artifacts/org.realityforge.gwt.mmvp/gwt-mmvp/
implementation ("org.realityforge.gwt.mmvp:gwt-mmvp:0.15")

'org.realityforge.gwt.mmvp:gwt-mmvp:jar:0.15'

<dependency org="org.realityforge.gwt.mmvp" name="gwt-mmvp" rev="0.15">
  <artifact name="gwt-mmvp" type="jar" />
</dependency>

@Grapes(
@Grab(group='org.realityforge.gwt.mmvp', module='gwt-mmvp', version='0.15')
)

libraryDependencies += "org.realityforge.gwt.mmvp" % "gwt-mmvp" % "0.15"

[org.realityforge.gwt.mmvp/gwt-mmvp "0.15"]