use better icons for sidebar

Netdisco/views/device.tt

@@ -1,10 +1,10 @@
 <img class="sidebar_toggle" id="sidebar_toggle_img_out"
-  src="[% uri_base %]/images/application_side_expand.png"/>
+  src="[% uri_base %]/images/splashyfish_right.png"/>
 <div class="container-fluid">
   <div class="sidebar">
     <div class="well">
       <img class="sidebar_toggle" id="sidebar_toggle_img_in"
-        src="[% uri_base %]/images/application_side_contract.png"
+        src="[% uri_base %]/images/splashyfish_left.png"
         rel="twipsy" data-placement="below" data-offset="5" title="Hide Sidebar"/>
       <h3 class="device_label">[% d.ip %]</h3>
       [% IF d.dns %]

Netdisco/views/search.tt

@@ -1,10 +1,10 @@
 <img class="sidebar_toggle" id="sidebar_toggle_img_out"
-  src="[% uri_base %]/images/application_side_expand.png"/>
+  src="[% uri_base %]/images/splashyfish_right.png"/>
 <div class="container-fluid">
   <div class="sidebar">
     <div class="well">
       <img class="sidebar_toggle" id="sidebar_toggle_img_in"
-        src="[% uri_base %]/images/application_side_contract.png"
+        src="[% uri_base %]/images/splashyfish_left.png"
         rel="twipsy" data-placement="below" data-offset="5" title="Hide Sidebar"/>
       <div class="tab-content">
         [% FOREACH tab IN vars.tabs %]

Netdisco/views/sidebar/device/ports.tt

@@ -5,7 +5,7 @@
             <div class="clearfix">
               <a class="field_clear_icon" href="#"
                 rel="twipsy" data-placement="right" data-offset="3" title="Show all Ports">
-                <img src="[% uri_base %]/images/sweep.png"/></a>
+                <img src="[% uri_base %]/images/tango_sweep.png"/></a>
               <input class="nd_port_query span3" placeholder="Port, Name or VLAN"
                 name="q" value="[% params.q %]" type="text"
                 rel="twipsy" data-placement="right" data-offset="5" title="Filter by Port, Name or VLAN"/>