Add direct write save option

* Closes #6335
* Modify application settings presentation to  allow for alternative saving strategies
* Transition Database::save calls to using flags to control saving behavior. Reduces boolean flags on function call.
* Made direct write save option a local setting to prevent unintentional carry over between platforms.

src/core/Config.h

@@ -44,6 +44,7 @@ public:
         AutoSaveNonDataChanges,
         BackupBeforeSave,
         UseAtomicSaves,
+        UseDirectWriteSaves,
         SearchLimitGroup,
         MinimizeOnOpenUrl,
         HideWindowOnCopy,