Add a default attribute to repeatableProperty and repeatable jelly tags

[FIXED JENKINS-9699] Fix unescaped apostrophe in French translation.

[FIXED JENKINS-9691] Boldify names of executed mojos for Freestyle and Maven2/3 jobs using Maven3 in console output.

Maven2/3 jobs using Maven3 in console output.
With Maven3 the output format for mojos has changed:
- Add a new Maven3MojoNote and use it in MavenConsoleAnnotator.
- This is sufficient for Freestyle jobs running Maven2 or 3 and Maven2/3
  jobs running Maven 2.
- Maven2/3 jobs running Maven 3 are using ExecutionEventLogger for
  printing start of mojo execution to console.

configurations

This change introduces the necessary extension point. The implementation
of this will be in a plugin.

Update changelog for fix of JENKINS-9197

rendering issues in IE can push the button to far right. Better to left-align this to avoid this problem in case it happens