[FEATURE] new StringUtils.join(List<StyledString>)
[FIX,FEATURE] ItemList click events could return the wrong element thus no action is activated.

Solved with the following feature. The browser mouse events provide the element the event originally occurred on.
This can be an inner tag element although it was expected that the outer element was passed.
You can provide the right element by adding one of the following classes to make the browser select the parent element: no_mouseup, no_mousedown, no_click.
Example:
<a><b class="no_click"><c class="no_click"></c></b></a>
If a user clicks on element c, a is part of the event.
[FIX] Removed problem that could result in a deadlock of the composer
[INTERNAL] Since today it seems that SWT can now correctly deal with PICT images OR Mac OS X Yosemite does no more provide this strange image format.
Anyhow, the CustomBrowserPasteHandler no more uses AWT to get the image and convert it to a standard image format but the standard image is simply retrieved using SWT.
[FEATURE] RGB provides its default values as instantiated colors as well
[FEATURE] New ExecUtils.busyWait(Future)
[FEATURE] New ListUtils - methods to reorder a List
[FIX] ViewerUtils.get*Items now also runs in non UI threads
[INTERNAL] NebulaPreferences.loadExpandedElements can now be run from a non UI thread