Fixes undo stack and clears stack on project creation

[StephenNneji]

The undo stack was not setup properly this fixes it. Also setup logging for exceptions in qt slots

[alexhroom]

i can't tell if this is the expected behaviour - i tried to test by adding an action to the toolbar that crashes it:

    def create_toolbar(self):
        """Creates the toolbar"""

        def fall_over():
            raise ValueError

        self.error = QtGui.QAction("&Crash", self)
        self.error.setStatusTip("Crash!")
        self.error.setIcon(QtGui.QIcon(path_for("help.png")))
        self.error.triggered.connect(fall_over)

        self.toolbar = self.addToolBar("ToolBar")
        self.toolbar.setContextMenuPolicy(QtCore.Qt.ContextMenuPolicy.PreventContextMenu)
        self.toolbar.setMovable(False)
        self.toolbar.setEnabled(False)

        self.toolbar.addAction(self.new_project_action)
        self.toolbar.addAction(self.open_project_action)
        self.toolbar.addAction(self.save_project_action)
        self.toolbar.addAction(self.undo_action)
        self.toolbar.addAction(self.redo_action)
        self.toolbar.addAction(self.export_plots_action)
        self.toolbar.addAction(self.open_help_action)
        self.toolbar.addAction(self.error)

and when I click this action I get the following in my terminal:

CRITICAL:root:An unhandled exception occurred!
Traceback (most recent call last):
  File "/home/rec93639/Code/RasCAL-2/rascal2/ui/view.py", line 158, in fall_over
    raise ValueError
ValueError

but the log file is empty.
so it's logging as expected, but it's logging to the terminal and not to the log file? is this what you intended or should it be logging to the file?

[StephenNneji]

It should now write to local log file and I have added a backup if a crash happens before local log is setup

[alexhroom]

looks all good now!