Adding support for searching text or regular expression in whole project

Moving xmlclass and docutils into plcopeneditor

Adding custom cell editor for interval value in task informations of ResourceEditor

- Fixing editing graphic element (handles, rubberband and highlight) in graphic editor in order to make them keep the same size whatever the zoom factor applied to graphic editor
- Replace default pen by a pen with miter join property to draw graphic elements without round corner in high zoom factor
- Reduce the default size of fonts in graphic editor

Fix bug on Windows after removing "Enable Undo/Redo" menu item

Fixing bug in Variable Panel when pressing Add,Delete,Up or Down button while a cell editor in variable grid is active

Adding column for selecting task triggering in Resource Editor

Fix PrintPreview behavior

Fix bug while generating direct global array variables

Fix bug in extraction and computation of array initial value

Enabling support for direct array variable declaration

Adding support for opening newly created project element

Fix some bugs in driven drawing for LD viewer

Fix bug in SFC Transition when using connection

Disabling location definition for enumerated and structure variables
Adding support for selecting enumerated variable initial value using choice cell editor

Fix bugs in exponentiation