Setting Dim Designer Percent to 200 causes popup error then close on Ok

[tznind]

Repro:

• Add a Label
• Set width
• Select Percent
• Enter 200
• Hit Ok

Expected Behaviour:

• Display an error either in line in editor or as a popup then return the the Dim Designer dialog

Observed behaviour:

Global error handler captures Exception and shows popup (Operation Failed). Clicking Ok terminates the program without saving.