Bug#931802: evolution: Text gets permanently deleted while composing an email reply

[Timothy Allen]

Package: evolution
Version: 3.32.2-1
Severity: important

Forwarded-To: https://gitlab.gnome.org/GNOME/evolution/issues/531

**Steps to reproduce:**

- I sent myself a plain text email containing a single line of text:

      abc

- When I received the email, I hit Ctrl-R to reply
- As per my configuration, Evolution opens a new plain-text compose window with
the email content quoted:

      On (time and date), Screwtapello wrote:
      > abc

- I select the text `abc` with my mouse
- I press the Delete key on my keyboard to delete it
- The "Undo" button on the toolbar becomes enabled, since an editing action has
been performed
- I click the "Undo" button on the toolbar to bring it back

**Actual results:**

- The "Undo" button becomes disabled, as though there's nothing to undo
- The deleted text does not reappear

**Expected results:**

- The deleted text reappears
- The "Undo" button becomes disabled, since there's nothing left to undo



-- System Information:
Debian Release: 10.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages evolution depends on:
ii  dbus                   1.12.16-1
ii  evolution-common       3.32.2-1
ii  evolution-data-server  3.32.2-2
ii  libc6                  2.28-10
ii  libcamel-1.2-62        3.32.2-2
ii  libclutter-gtk-1.0-0   1.8.4-4
ii  libecal-1.2-19         3.32.2-2
ii  libedataserver-1.2-24  3.32.2-2
ii  libevolution           3.32.2-1
ii  libglib2.0-0           2.58.3-2
ii  libgtk-3-0             3.24.5-1
ii  libical3               3.0.4-3
ii  libnotify4             0.7.7-4
ii  libsoup2.4-1           2.64.2-2
ii  libwebkit2gtk-4.0-37   2.24.2-1
ii  libxml2                2.9.4+dfsg1-7+b3
ii  psmisc                 23.2-1

Versions of packages evolution recommends:
ii  evolution-plugin-bogofilter  3.32.2-1
ii  evolution-plugin-pstimport   3.32.2-1
ii  evolution-plugins            3.32.2-1
ii  yelp                         3.31.90-1

Versions of packages evolution suggests:
pn  evolution-ews                   <none>
ii  evolution-plugins-experimental  3.32.2-1
ii  gnupg                           2.2.12-1
ii  network-manager                 1.14.6-2

-- debconf information:
  evolution/needs_shutdown:
  evolution/kill_processes: