Tweaked tooltip text

popup.js

 	info.classList.toggle("whitelist", (AKS.mode == "whitelist"));
 
 	mainButton.dataset["tooltip"] = active ? 
-									"Click to stop killing stickies on this page" :
-									"Click to kill stickies on this page";
+									"Click to stop killing stickies on this site" :
+									"Click to start killing stickies on this site";
 	modeLabel.dataset["tooltip"] = (AKS.mode == "whitelist") ?
 								   "Stickies are killed *except* on sites you exclude" :
 								   "Stickies are killed *only* on specified sites";