[Bugs] #4203 sugar HIGH: Text selection handlers disappears on Gtk.Entry when "Backspace" is pressed

[Sugar Labs Bugs]

#4203: Text selection handlers disappears on Gtk.Entry when "Backspace" is pressed
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    Reporter:  humitos  |          Owner:  garnacho   
        Type:  defect   |         Status:  assigned   
    Priority:  High     |      Milestone:  0.98       
   Component:  sugar    |        Version:  Unspecified
    Severity:  Major    |       Keywords:  triage     
Distribution:  OLPC     |   Status_field:  Assigned   
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Changes (by erikos):

  * status:  new => assigned
  * priority:  Unspecified by Maintainer => High
  * milestone:  Unspecified by Release Team => 0.98
  * owner:  erikos => garnacho
  * distribution:  Unspecified => OLPC
  * status_field:  Unconfirmed => Assigned
  * severity:  Unspecified => Major


Old description:

> Steps to reproduce it:
>
>  1. Go to eBook mode
>  1. Go to Home/Neighborhood/Group view
>  1. Tap on the "Search" entry
>  1. Text selection handlers are shown
>  1. Type something
>  1. They still be there while you are typing
>  1. Press "Backspace"
>
> Issue:
>
> Those text selection handlers dissapear.
>
> Expected behaviour:
>
> Keep showing those handlers
>
> Environment:
>
> XO-4 13.1.0 os11

New description:

 Steps to reproduce it:

  1. Go to eBook mode
  1. Go to Home/Neighborhood/Group view
  1. Tap on the "Search" entry
  1. Text selection input handler is shown
  1. Type something
  1. The handler does update it's position accordingly
  1. Press "Backspace"

 Issue:

 The input handler does disappear when backspace is tapped on the OSK for
 the first time. It should update it's position like it did when entering
 new characters.

 Expected behaviour:

 Keep showing those handlers

 Environment:

 XO-4 13.1.0 os11

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Ticket URL: <http://bugs.sugarlabs.org/ticket/4203#comment:2>
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