Spark Label displays the first section of text when set to right orientation, rather than last section.

Found in 4.5.0.18118

Steps to reproduce:
1. Compile and run attached MXML file.
2. Observe output.

Actual Results:
The beginning of the sentence is displayed with an ellipsis at the right indicating there is more text.
Both the Spark Label and RichText display "The ...".

Expected Results:
The end of the sentence is displayed with an ellipsis at the left indicating there is more text.
Since the textAlign style is set to "right", the output should be "... fox".

Workaround (if any):
None.