Removed JanewayModule's static Tab members, and replaced them with a TabPaneController singleton.  Removed unnecessary TabPaneController members from other classes.
Removed unnecessary reloadData().
Merge branch 'dev-gradle' into refactor-tabs
Merge branch 'dev-gradle' into refactor-tabs

Conflicts:
	TaskManager/src/main/java/taskManager/controller/TabPaneController.java
	TaskManager/src/main/java/taskManager/controller/TaskController.java
	TaskManager/src/test/java/taskManager/controller/TestEditTaskController.java
Added Javadoc comment to TaskInfoPreviewView constructor