Rename <snapping><dragResistance> to <resistance><unSnapThreshold>

As we already have <resistance><{screen,window}EdgeStrength>,
<resistance> will be a better place for this setting.

docs/labwc-config.5.scd

@@ -326,6 +326,10 @@ this is for compatibility with Openbox.
 
 	The default value for both parameters is 20 pixels.
 
+*<resistance><unSnapThreshold>*
+	Sets the movement of cursor in pixel required for a tiled or maximized
+	window to be moved with an interactive move. Default is 20.
+
 ## FOCUS
 
 *<focus><followMouse>* [yes|no]
@@ -356,10 +360,6 @@ extending outward from the snapped edge.
 	SnapToEdge action for that edge. A *range* of 0 disables snapping via
 	interactive moves. Default is 1.
 
-*<snapping><dragResistance>*
-	Sets the movement of cursor in pixel required for a tiled or maximized
-	window to be moved with an interactive move. Default is 20.
-
 *<snapping><overlay><enabled>* [yes|no]
 	Show an overlay when snapping to a window to an edge. Default is yes.
 

docs/rc.xml.all

@@ -107,6 +107,7 @@
   <resistance>
     <screenEdgeStrength>20</screenEdgeStrength>
     <windowEdgeStrength>20</windowEdgeStrength>
+    <unSnapThreshold>20</unSnapThreshold>
   </resistance>
 
   <resize>
@@ -125,7 +126,6 @@
   <snapping>
     <!-- Set range to 0 to disable window snapping completely -->
     <range>1</range>
-    <dragResistance>20</dragResistance>
     <overlay enabled="yes">
       <delay inner="500" outer="500" />
     </overlay>