Property Access nodes fail to display variable data in SM transition tooltips

The data shown in the transition tooltip is generated via SKismetLinearExpression::MakeNodeWidget. The issue is that while UK2Node_VariableGet have specific functionality to display the variables accessed via get nodes using the coloured pill image, no equivalent functionality exists for UK2Node_PropertyAccess. We can’t just add functionality for that type here since property access lives in a plugin. So it seems a larger refactor is required to either have the K2 nodes generate these widgets themselves or have a factory to do it.

1. Create an anim blueprint
2. Add a state machine
3. Create two states
4. Add a transition
5. Add a bool variable to the blueprint
6. Inside the transition graph, add a Property Access node and use that to get the bool variable that you just added
7. Wire up the output of the property access node to the Can Enter Transition property
8. Compile the anim bp
9. Back in the state machine, mouse over the transition to view the tooltip
   1. Expected behaviour: The variables driving the transition are displayed in the same way as when a regular bp getter node is used (ie. a coloured pill image is displayed containing the name of the variable) - see first screenshot
   2. Actual behaviour: The tooltip doesn’t display any information about the variables driving the transition - see second screenshot