Merge to XFA: Beef up app_props.in and tidy app.cpp.

testing/resources/javascript/app_props_expected.txt

Index: testing/resources/javascript/app_props_expected.txt
diff --git a/testing/resources/javascript/app_props_expected.txt b/testing/resources/javascript/app_props_expected.txt
index 405f9c822749500d3b3ab4478d6dc7ed457fd99d..6e78ba510b1136f862bf038802af5edfb0b00112 100644
--- a/testing/resources/javascript/app_props_expected.txt
+++ b/testing/resources/javascript/app_props_expected.txt
@@ -1 +1,39 @@
-Alert: app.viewerType property value: pdfium
+Alert: *** Getting properties ***
+Alert: app.activeDocs is object [object Object]
+Alert: app.calculate is boolean true
+Alert: app.formsVersion is number 7
+Alert: ERROR: app.fs: 
+Alert: ERROR: app.fullscreen: 
+Alert: app.language is string ENU
+Alert: ERROR: app.media: 
+Alert: app.platform is string WIN
+Alert: app.runtimeHighlight is boolean false
+Alert: app.viewerType is string pdfium
+Alert: app.viewerVariation is string Full
+Alert: app.viewerVersion is number 8
+Alert: *** Setting properties ***
+Alert: ERROR: app.activeDocs: 
+Alert: app.calculate = 3; yields 3
+Alert: ERROR: app.formsVersion: 
+Alert: ERROR: app.fs: 
+Alert: ERROR: app.fullscreen: 
+Alert: ERROR: app.language: 
+Alert: ERROR: app.media: 
+Alert: ERROR: app.platform: 
+Alert: app.runtimeHighlight = 3; yields 3
+Alert: ERROR: app.viewerType: 
+Alert: ERROR: app.viewerVariation: 
+Alert: ERROR: app.viewerVersion: 
+Alert: *** Getting properties ***
+Alert: app.activeDocs is object [object Object]
+Alert: app.calculate is boolean true
+Alert: app.formsVersion is number 7
+Alert: ERROR: app.fs: 
+Alert: ERROR: app.fullscreen: 
+Alert: app.language is string ENU
+Alert: ERROR: app.media: 
+Alert: app.platform is string WIN
+Alert: app.runtimeHighlight is boolean true
+Alert: app.viewerType is string pdfium
+Alert: app.viewerVariation is string Full
+Alert: app.viewerVersion is number 8