add initial barrier function and fix history

config/settings/espeak.settings.conf

@@ -186,7 +186,8 @@ shell=
 [focus]
 cursor=True
 highlight=False
-
+barrier=True
+  
 [review]
 lineBreak=True
 endOfScreen=True

config/settings/settings.conf

@@ -196,6 +196,7 @@ shell=
 cursor=True
 #follow highlighted text changes
 highlight=False
+barrier=True
   
 [review]
 lineBreak=True

config/settings/settings.conf.example

@@ -197,6 +197,7 @@ shell=
 cursor=True
 #follow highlighted text changes
 highlight=False
+barrier=True
   
 [review]
 lineBreak=True

config/settings/settings.conf.storm

@@ -142,6 +142,7 @@ shell=
 cursor=True
 #follow highlighted text changes
 highlight=False
+barrier=True
 
 [review]
 lineBreak=True

config/settings/speech-dispatcher.settings.conf

@@ -196,6 +196,7 @@ shell=
 cursor=True
 #follow highlighted text changes
 highlight=False
+barrier=True
   
 [review]
 lineBreak=True