Move duplicated 'ViewFormWidget' class to the 'common.ui' plugin

The class 'ViewFormWidget' can be currently found at two locations:

• /connection.ui/src/main/java/org/apache/directory/studio/connection/ui/widgets/ViewFormWidget.java [1]
• /ldapbrowser.common/src/main/java/org/apache/directory/studio/ldapbrowser/common/widgets/ViewFormWidget.java [2]

Now that we have the 'common.ui' plugin, it would be better to have a single version of this class there.

[1] - http://svn.apache.org/viewvc/directory/studio/trunk/connection.ui/src/main/java/org/apache/directory/studio/connection/ui/widgets/ViewFormWidget.java?view=co
[2] - http://svn.apache.org/viewvc/directory/studio/trunk/ldapbrowser.common/src/main/java/org/apache/directory/studio/ldapbrowser/common/widgets/ViewFormWidget.java?view=co