include preparedToBeSaved override that cleares the stylecontext. ref #…

…52. WARNING:

this may break saving for your Pheno widgets. If you do notice any odd behavior, please report a bug and we will either revert this change or find the correct fix (which would likely involve reconstructing the consistent state after being restored from a refstream)

src/Pheno-Styles.package/Morph.extension/instance/prepareToBeSaved.st

@@ -0,0 +1,10 @@
+*Pheno-Styles
+prepareToBeSaved
+	"Prepare this morph to be saved to disk. Subclasses should nil out any instance variables that holds state that should not be saved, such as cached Forms. Note that this operation may take more drastic measures than releaseCachedState; for example, it might discard the transcript of an interactive chat session."
+
+	self releaseCachedState.
+	self formerOwner: nil.
+	self formerPosition: nil.
+	self removeProperty: #undoGrabCommand.
+	fullBounds := nil
+	self removeProperty: #styleContext

src/Pheno-Styles.package/Morph.extension/methodProperties.json

@@ -8,6 +8,7 @@
 		"assureWidgetParent" : "TB 4/4/2018 11:58",
 		"convertPaddingToRectangle:" : "TB 4/20/2018 10:50",
 		"isWidget" : "TB 4/6/2018 13:53",
+		"prepareToBeSaved" : "TB 6/22/2018 22:31",
 		"removeStyleClass:" : "TB 4/4/2018 14:32",
 		"resetStyleState" : "TB 4/4/2018 11:49",
 		"styleClasses" : "TB 4/4/2018 11:49",