Various UX improvements

[vainolo]

Various UX improvements

[vainolo]

• Actions to create procedural link types directly from the diagram.
• Try to show only available actions in context menu to make it shorter
• Procedural link actions will now create links with a starting node if
  this is possible
• Creation of object, process, and state now activate direct editing of
  the name of the entity, default name was also changed to be empty
• Changed cons/res link width and end arrow
• Removed commented code, temp code comments, and fixed bug that closed
  editor when the content changed and was saved.
• Hid exception in call to figure auto-resize when the editor was being
  closed and the widget was disposed.

[vainolo]

• Divided input/output processes into two: one pair to read/write from console, another to read/write from dialog boxes.
• Added optional parameter to dialog and console input processes to enter a prompt to the user
• Separated reading/writing of JSON<->OPPObjectInstance from the process instances that do this so that is can be called from other process instances, like calling web services

[vainolo]

Added option to reconnect source and target of procedural links

[vainolo]

• User can now define an initial value for an object variable (including object parts) using the "name = value" notation
• Added more figure constants to remove magic numbers from code
• New function to check if object has a part before fetching it
• Object creation process is now called "Create Object"
• Get part now also returns a value that tells if the object exists or not. Should expand this to other get processes.
• Fixed bug in copying of argument values to heap that failed when object returned was null
• Fixed bug fetching a part that is null with a parent that is null. This can now be done and null is returned as value
• Improved logging
• Aded more examples

[vainolo]

Stopped using the command stack for in-zoom commands, because it is not part of what is done in the current editor. This improves usability because before this change when a thing was in-zoomed the editor became dirty and had to be saved. Now only the new OPD must be saved.

[vainolo]

User can now rename OPP file and this will also rename the model that is in the file. Workaround to change the name of the OPD without breaking things.