Switch to side-by-side view

--- a/src/qtgui/recoll.h
+++ b/src/qtgui/recoll.h
@@ -36,6 +36,8 @@
 extern RclConfig *thestableconfig;
 extern PTMutexInit thestableconfiglock;
 extern void snapshotConfig();
+extern void rememberTempFile(TempFile);
+extern void forgetTempFile(string &fn);
 
 extern Rcl::Db *rcldb;
 extern int recollNeedsExit;