Use lxqt-sudo by default

[pmattern]

In order to open a new window as root (Tool - Open as root) PCManFM-Qt is looking for gksu as backend only by default.
This should be replaced with lxqt-sudo introduced recently in the long run.

Btw. shouldn't this be 'Tool_s_' in the menu bar?

[Edit: correct that backend can be chosen and hence gksu isn't the only one available but just the default]

[q4a]

You can change it in settings: http://i.imgur.com/fRUQUlCh.png
This does not working for me: nothing happens. May be it's lxqt-sudo bug?
PS I still can run "lxqt-sudo pcmanfm-qt" from command line and get it working.

[pmattern]

You can change it in settings [...]

Of course. I had totally forgotten that setting when filing this issue and modified the text accordingly.

The apparent malfunction of lxqt-sudo is probably due to the fact that PCManFM-Qt isn't assuming sudo as backend but su and support of the latter is wip in lxqt-sudo.

(So basically this issue has to be postponed until the problems that came up in the said PR are fixed.)

[agaida]

@pmattern - makeing lxqt-sudo default would introduce a dependeny (or at least a recommend) to lxqt-sudo, so pcmanfm-qt should look if lxqt-sudo is present and has a reliable fallback - no clue if this is a really clever move (mind using pcmanfm-qt outside of LXQt). But i would second this.

[pmattern]

@agaida
Are you sure regarding dependencies?
Grepping through the code and running ldd strongly suggest that it's not a dependency at all but just a configuration setting, see here.
So trading gksu with lxqt-sudo or what ever it may be renamed to wouldn't change dependencies at all, would it?

[agaida]

not a build dependency or so - but i would consider a program broken if it blindly trust in the presence of another package - so this should be handled gracefully - in that case it isn't a dependency, just recommended.

[pmattern]

Don't know whether there's some kind of common approach to deal with "soft dependencies" like this. But isn't it rather downstream's / packager's job to craft their packages accordingly, something like optdepends on Arch Linux or Recommends / Suggests on Debian and derivatives?

Nevertheless I still think trading gksu with something different wouldn't change the situation regarding dependencies at all and that hence the latter is beyond this issue's scope.

[PCMan]

Done. The default value is changed to lxqt-sudo now in pcmanfm-qt and the default config file shipped with lxqt-common.