Allow not counting time in private tabs

Closes https://github.com/ajayyy/SponsorBlock/issues/703

src/config.ts

@@ -21,6 +21,7 @@ interface SBConfig {
     showTimeWithSkips: boolean,
     disableSkipping: boolean,
     trackViewCount: boolean,
+    trackViewCountInPrivate: boolean,
     dontShowNotice: boolean,
     hideVideoPlayerControls: boolean,
     hideInfoButtonPlayerControls: boolean,
@@ -154,6 +155,7 @@ const Config: SBObject = {
         showTimeWithSkips: true,
         disableSkipping: false,
         trackViewCount: true,
+        trackViewCountInPrivate: true,
         dontShowNotice: false,
         hideVideoPlayerControls: false,
         hideInfoButtonPlayerControls: false,