Ensure onenter/onleave attributes don't get 'stuck'.

diff --git a/Clique.lua b/Clique.lua
index 5de99f0..218b534 100755
--- a/Clique.lua
+++ b/Clique.lua
@@ -391,12 +391,15 @@ function addon:GetBindingAttributes(global)
         set = {
             "local button = self",
             "local name = button:GetName()",
+            "if danglingButton then control:RunFor(danglingButton, control:GetAttribute('setup_onleave')) end",
             "if blacklist[name] then return end",
+            "danglingButton = button",
         }
         clr = {
             "local button = self",
             "local name = button:GetName()",
             "if blacklist[name] then return end",
+            "danglingButton = nil",
         }
     end