Switch to side-by-side view

--- a/src/qtgui/recoll.pro.in
+++ b/src/qtgui/recoll.pro.in
@@ -22,6 +22,7 @@
         idxsched.h \
         listdialog.h \
         preview_w.h \
+        ptrans_w.h \
         rclhelp.h \
         rclmain_w.h \
         reslist.h \
@@ -34,7 +35,6 @@
         uiprefs_w.h \
         viewaction_w.h \
 
-
 SOURCES += \
         advsearch_w.cpp \
         advshist.cpp \
@@ -44,6 +44,7 @@
         guiutils.cpp \
         main.cpp \
         preview_w.cpp \
+        ptrans_w.cpp \
         rclhelp.cpp \
         rclmain_w.cpp \
         rclzg.cpp \
@@ -65,6 +66,7 @@
         firstidx.ui \
         idxsched.ui \
         listdialog.ui \
+        ptrans.ui \
         rclmain.ui \
         restable.ui \
         rtitool.ui \