added 'SetXProp' action and (@PROP=foo) clientpattern

these two allow 'tagging' of arbitrary windows with 'tags' (or 'labels'). such 'tagged' windows can then be used in ':NextWindow (@PROP=foo)' commands to quickly cycle through a subset of available windows.
since the 'tags' are applied as real xproperties to a window they survive a restart of fluxbox or even another windowmanager. the user can also set the tags by using xprop(1).

the next step regarding the UI should be to visualize the tags of a window.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/Window.hh b/src/Window.hh
index 080ceac..7f8133e 100644
--- a/src/Window.hh
+++ b/src/Window.hh
@@ -422,6 +422,7 @@ public:
     const FbTk::FbString &getWMClassName() const;
     const FbTk::FbString &getWMClassClass() const;
     std::string getWMRole() const;
+    FbTk::FbString getTextProperty(Atom prop) const;
     void setWindowType(WindowState::WindowType type);
     bool isTransient() const;