Use xdi for X11 WM info

- Switch from `leftwm-state` to `xdi`
- More generic, no more specific to `leftwm`

nbcl/components/datetime_widg.nbcl

@@ -10,15 +10,3 @@ component DateTimeWidg (widgname, widgtextvar) {
 		height = config.panel_height
 	}
 }
-
-#-
-# Example usage
-		DateTimeWidg "paneldatewidg" {
-			widgname = "paneldatewidg"
-			widgtextvar = "date_ddM"
-		}
-		DateTimeWidg "paneltimewidg" {
-			widgname = "paneltimewidg"
-			widgtextvar = "time_hhmm"
-		}
--#

nbcl/panel/panel_section_center.nbcl

@@ -18,7 +18,7 @@ fn panel_center() {
 			truncate_left = false
 			limit_width = config.panel_windowtitle_maxchars
 			text = global("xdistate").mutate(|val|{
-				json.parse(val).window_title
+				json.parse(val).active_window.name
 			})
 		}
 	}

nbcl/vars/xdi.nbcl

@@ -2,7 +2,7 @@ import core.json
 
 Listen "xdistate" {
 	initial = "{}"
-	cmd = "leftwm-state"
+	cmd = "xdi -f"
 }