Refactor classes to remove ui files being included in headers.

To have a developer install of ParaView we need references the auto generated
Qt ui files in the headers of classes, since those files are never installed.

Change-Id: Idc0f9931f9705b4c3833ce37119e854211087e50
Install required headers for SGExportStateWizard.

The SGExportStateWizard and its children need the ui file to be installed,
since they all access and modify member variables defined in it.

Change-Id: Ief11b3c254ddbc08aafea8714ce9bf7a417c9602
Merge topic 'fix_dev_install' into next

ce2e6cb4 Install required headers for SGExportStateWizard.
e7a0d494 Refactor classes to remove ui files being included in headers.