Prevent WebUI tables from being highlighted

src/webui/www/private/properties_content.html

@@ -99,7 +99,7 @@
     </div>
 </div>
 
-<div id="prop_peers" class="invisible">
+<div id="prop_peers" class="invisible unselectable">
     <div>
         <div id="torrentPeersTableFixedHeaderDiv" class="dynamicTableFixedHeaderDiv">
             <table class="dynamicTable" style="position:relative;">
@@ -119,7 +119,7 @@
     </div>
 </div>
 
-<div id="prop_webseeds" class="invisible">
+<div id="prop_webseeds" class="invisible unselectable">
     <div id="webseeds">
         <table class="dynamicTable" style="width: 100%">
             <thead>
@@ -132,7 +132,7 @@
     </div>
 </div>
 
-<div id="prop_files" class="invisible">
+<div id="prop_files" class="invisible unselectable">
     <div id="torrentFiles">
         <table class="dynamicTable" style="width: 100%">
             <thead>