Bug#931586: reportbug: Using 'Back' button in reportbug (GUI) returns to uneditable text boxes

[Seth Foley <medeii@hotmail.com>]

Package: reportbug
Version: 7.5.2
Severity: normal

Dear Maintainer,

   * What led up to the situation?
     Looking for bugs on a different package, I launched reportbug from the
Gnome menu.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
     (1) Launch reportbug (GUI)
     (2) Type and select a package name; click Next
     (3) Review bugs and decide that I selected the wrong package
     (4) Click Back

   * What was the outcome of this action?
     I was unable to type a different package name because the text box was
disabled and greyed out. I had to close and reopen reportbug to continue.

   * What outcome did you expect instead?
     I should be able to type a new package name and search that instead.

Notably, although I am using the GUI version of reportbug, the "reportbug-gtk"
package is not installed on my system.



-- Package-specific info:
** Environment settings:
INTERFACE="gtk"

** /home/sfoley/.reportbugrc:
reportbug_version "7.5.2"
mode novice
ui gtk
realname "Seth Foley"
email "medeii@hotmail.com"
no-cc
list-cc-me
smtphost reportbug.debian.org

-- System Information:
Debian Release: 10.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-5-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages reportbug depends on:
ii  apt                1.8.2
ii  python3            3.7.3-1
ii  python3-reportbug  7.5.2
ii  sensible-utils     0.0.12

reportbug recommends no packages.

Versions of packages reportbug suggests:
pn  claws-mail                                 <none>
pn  debconf-utils                              <none>
pn  debsums                                    <none>
pn  dlocate                                    <none>
pn  emacs24-bin-common | emacs25-bin-common    <none>
ii  exim4-daemon-light [mail-transport-agent]  4.92-8
ii  file                                       1:5.35-4
ii  gnupg                                      2.2.12-1
pn  python3-urwid                              <none>
pn  reportbug-gtk                              <none>
ii  xdg-utils                                  1.1.3-1

Versions of packages python3-reportbug depends on:
ii  apt                1.8.2
ii  file               1:5.35-4
ii  python3            3.7.3-1
ii  python3-apt        1.8.4
ii  python3-debian     0.1.35
ii  python3-debianbts  2.8.2
ii  python3-requests   2.21.0-1

python3-reportbug suggests no packages.

-- no debconf information