[cuegui] Save job user colors (#1463)

Job colors set using the right-click menu "set user color" option is now
saved on the session config file and reloaded when the application is
initialized.

cuegui/cuegui/JobMonitorTree.py

@@ -23,6 +23,7 @@
 from future.utils import iteritems
 from builtins import map
 import time
+import pickle
 
 from qtpy import QtCore
 from qtpy import QtGui
@@ -395,6 +396,14 @@ def removeFinishedItems(self):
         for item in self.findItems("Finished", QtCore.Qt.MatchFixedString, COLUMN_STATE):
             self.removeItem(item)
 
+    def getUserColors(self):
+        """Returns the colored jobs to be saved"""
+        return list(pickle.dumps(self.__userColors))
+
+    def setUserColors(self, state):
+        """Sets the colored jobs that were saved"""
+        self.__userColors = pickle.loads(bytes(state))
+
     def contextMenuEvent(self, e):
         """Creates a context menu when an item is right clicked.
         @param e: Right click QEvent

cuegui/cuegui/plugins/MonitorJobsPlugin.py

@@ -81,6 +81,9 @@ def __init__(self, parent):
                                      ("jobs",
                                       self.getJobIds,
                                       self.restoreJobIds),
+                                     ("userColors",
+                                      self.jobMonitor.getUserColors,
+                                      self.jobMonitor.setUserColors),
                                      ("columnVisibility",
                                       self.jobMonitor.getColumnVisibility,
                                       self.jobMonitor.setColumnVisibility),