Support of RTL languages in the UI forms (Arabic, Hebrew, Persian etc..)

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Just look at the Arabic/Hebrew translation

Tested on Gantproject 2.7 on Ubuntu Linux and Windows 7 Pro

UI items such as Radio button, List box, Text box should change their alignment 
to right when an RTL language is used.

Also the arrangement of Next/Back/Ok/Cancel buttons should be mirrored.
See the attached visual explanation.

While I never written any Java code, it seems that SWING has good support for 
switching between RIGHT_TO_LEFT and LEFT_TO_RIGHT languages using the 
"applyComponentOrientation". 

Original issue reported on code.google.com by [email protected] on 14 Jun 2015 at 7:21

Attachments:

• [GanttProject RTL UI issues.png](https://storage.googleapis.com/google-code-attachments/ganttproject/issue-1145/comment-0/GanttProject RTL UI issues.png)