Fix WEA-240 (Propagate error message)
Set default value to true for exporting DICOM. Sort combo
alphanumerically according the selected language.

Conflicts:
	weasis-launcher/src/main/java/org/weasis/launcher/WeasisLauncher.java
Sort correctly string in each language

Conflicts:
	weasis-dicom/weasis-dicom-explorer/src/main/java/org/weasis/dicom/explorer/DicomExplorer.java
add user singleInstance property in portable version
Fix loading two times the same image when building a thumbnail

Conflicts:
	weasis-core/weasis-core-api/src/main/java/org/weasis/core/api/media/data/SeriesThumbnail.java
	weasis-core/weasis-core-api/src/main/java/org/weasis/core/api/media/data/Thumbnail.java
Add in audit logger download information (type, size, time, rate)
Change error tag to message
Extract strings for releasing
Prepare to release
[maven-release-plugin] prepare release 1.2.8
[maven-release-plugin] prepare for next development iteration
Next dev version