[ENH] Adjust MenuAction

[genedan]

There's some repetitive code here:

FASLR/faslr/menu.py

Lines 58 to 78 in 73799da

	self.connection_action = MenuAction(ICONS_PATH + "db.svg", "&Connection", self)
	self.connection_action.setShortcut(QKeySequence("Ctrl+Shift+c"))
	self.connection_action.setStatusTip("Edit database connection.")
	# noinspection PyUnresolvedReferences
	self.connection_action.triggered.connect(self.edit_connection)
	self.new_action = QAction("&New Project", self)
	self.new_action.setShortcut(QKeySequence("Ctrl+n"))
	self.new_action.setStatusTip("Create new project.")
	# noinspection PyUnresolvedReferences
	self.new_action.triggered.connect(self.new_project)
	self.import_action = QAction("&Import Project")
	self.import_action.setShortcut(QKeySequence("Ctrl+Shift+i"))
	self.import_action.setStatusTip("Import a project from another data source.")
	self.engine_action = QAction("&Select Engine")
	self.engine_action.setShortcut("Ctrl+shift+e")
	self.engine_action.setStatusTip("Select a reserving engine.")
	self.engine_action.triggered.connect(self.display_engine) # noqa

Since the methods such as setShortcut and setStatusTip are called shortly after object initialization, we can make the code a bit more readable by adding parameters to the new MenuAction class. Thus:

self.new_action = QAction("&New Project", self)
self.new_action.setShortcut(QKeySequence("Ctrl+n"))
self.new_action.setStatusTip("Create new project.")
self.new_action.triggered.connect(self.new_project)

Will become something like:

self.new_action = MenuAction(
    label="&New Project"
    key_sequence="Ctrl+n"
    status_tip="Create new project."
    connect=self.new_project
)