More concise install dialog

src/freedombone-addremove

             dialog --title $"$installs" \
                    --backtitle $"Freedombone" \
                    --defaultno \
-                   --yesno $"\nYou have chosen to install the $installs app.\n\nIf you select 'yes' then the install will go ahead.\n\nAre you sure that you wish to continue?" 11 60
+                   --yesno $"\nThis will install the $installs app.\n\nProceed?" 9 60
         else
+            dialog_height=$((15 + $n))
             dialog --title $"Add applications" \
                    --backtitle $"Freedombone" \
                    --defaultno \
-                   --yesno $"\nYou have chosen to install $n apps.\n\n    $installs\n\nIf you select 'yes' then these will now be installed.\n\nAre you sure that you wish to continue?" 15 60
+                   --yesno $"\nYou have chosen to install $n apps.\n\n    $installs\n\nProceed?" $dialog_height 60
         fi
         sel=$?
         case $sel in