lxqt-config-session after saving autostart element, add new backslashes before quotes

lxqt-config-session after saving autostart element, add new backslashes before quotes even if there is exist backslashe before quotes.

Expected Behavior

lxqt-config-session before saving autostart element has to check for existing backslashe before quotes and for this case do not add a new backslashe.

Current Behavior

lxqt-config-session after saving autostart element, add new backslashes before quotes even if there is exist backslashe before quotes.

Possible Solution

Steps to Reproduce (for bugs)

1. Launch lxqt-config-session
2. Create test autostart element with command sh -c "sleep 12 && _some_cmd"
3. Save it
4. Try to edit this autostart element: the command became sh -c "sleep 12 && _some_cmd"
5. Save it. After each saving, there is more and more backslashes before quotes: sh -c \"sleep 12 && _some_cmd\"

Context

System Information

• Distribution & Version: Debian buster
• Kernel: 4.19
• Qt Version: 0.14.1
• liblxqt Version:0.14.1-1
• lxqt-build-tools Version: 0.6.0-2
• Package version: lxqt-session (0.14.1-2)

[agaida]

Confirmed on latest git

[tsujan]

It may be a very old issue never reported before.

[luis-pereira]

Confirmed on latest git.

[stefonarch]

I'm running into this, but it adds also backlashes were they aren't needed, resulting in an invalid autostart entry.

1. Add an autostart entry
2. Add something like bash -c "if [ "$XDG_SESSION_TYPE" = "wayland" ];then sfwbar" into the "command" lineedit
3. Check the file, it will have
   Exec=bash -c \\"if [ \\"\\$XDG_SESSION_TYPE\\" = \\"wayland\\" ];then sfwbar\\"
4. Edit it, and backlashes will double.