installer: enable FSCache by default, ignoring previous settings

Most users simply click through the installer and do not benefit from
our previous change that made FSCache enabled by default, because during
an upgrade the previous setting (which was disabled by default) would be
replayed.

Let's skip replaying the previous setting for a couple of releases so
that users get to benefit from the FSCache speedup.

Pointed out by Buck Hodges.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

installer/install.iss

@@ -1016,7 +1016,7 @@ begin
         Height:=ScaleY(17);
         Font.Style:=[fsBold];
         TabOrder:=0;
-        Checked:=False;
+        Checked:=True;
     end;
     LblFSCache:=TLabel.Create(ExtraOptionsPage);
     with LblFSCache do begin
@@ -1031,13 +1031,6 @@ begin
         Height:=ScaleY(39);
     end;
 
-    // Restore the settings chosen during a previous install.
-    Data:=ReplayChoice('Performance Tweaks FSCache','Enabled');
-
-    if Data='Enabled' then begin
-        RdbExtraOptions[GP_FSCache].Checked:=True;
-    end;
-
     // 2nd option
     RdbExtraOptions[GP_GCM]:=TCheckBox.Create(ExtraOptionsPage);
     with RdbExtraOptions[GP_GCM] do begin