TextView: Update nav shortcuts again

Make Cmd+Left and Cmd+Right work the same as Option+Left and
Option+Right, that is, they do word-wise navigation.

Make Option+Up go to beginning of paragraph and Option+Down go to end
of paragraph like Cmd+Left and Cmd+Right used to.

Unfortunately option shortcuts are currently eaten by S&T until #9431
gets fixed.

headers/os/interface/TextView.h

@@ -453,15 +453,17 @@ private:
 			LayoutData*			fLayoutData;
 			int32				fLastClickOffset;
 
-			bool				fInstalledNavigateLinewiseShortcuts;
-			bool				fInstalledNavigateWordwiseShortcuts;
-			bool				fInstalledNavigateDocwiseShortcuts;
-			bool				fInstalledNavigateToTopOrBottomShortcuts;
+			bool				fInstalledNavigateCommandWordwiseShortcuts;
+			bool				fInstalledNavigateOptionWordwiseShortcuts;
+			bool				fInstalledNavigateOptionLinewiseShortcuts;
+			bool				fInstalledNavigateCommandDocwiseShortcuts;
+			bool				fInstalledNavigateHomeEndDocwiseShortcuts;
 
-			bool				fInstalledSelectLinewiseShortcuts;
-			bool				fInstalledSelectWordwiseShortcuts;
-			bool				fInstalledSelectDocwiseShortcuts;
-			bool				fInstalledSelectToTopOrBottomShortcuts;
+			bool				fInstalledSelectCommandWordwiseShortcuts;
+			bool				fInstalledSelectOptionWordwiseShortcuts;
+			bool				fInstalledSelectOptionLinewiseShortcuts;
+			bool				fInstalledSelectCommandDocwiseShortcuts;
+			bool				fInstalledSelectHomeEndDocwiseShortcuts;
 
 			uint32				_reserved[6];
 };