Make the time before activating a tooltip configurable

add a section in the left pannel of the notebook to make the time before
	triggering a tooltip when pressign "(" configurable.  Negative values will
	disable the tooltip (comparaison at each keypress for now, but can be
	improved) The syle of the <input> field should be a little improve, why not
	a slider with jquerry

IPython/frontend/html/notebook/static/js/codecell.js

@@ -64,8 +64,11 @@ var IPython = (function (IPython) {
         // handlers and is used to provide custom key handling. Its return
         // value is used to determine if CodeMirror should ignore the event:
         // true = ignore, false = don't ignore.
-        tooltip_wait_time = 2000;
 
+        // note that we are comparing and setting the time to wait at each key press.
+        // a better wqy might be to generate a new function on each time change and
+        // assign it to CodeCell.prototype.request_tooltip_after_time
+        tooltip_wait_time = this.notebook.time_before_tooltip;
         tooltip_on_tab    = this.notebook.tooltip_on_tab;
         var that = this;
 

IPython/frontend/html/notebook/static/js/notebook.js

@@ -28,6 +28,7 @@ var IPython = (function (IPython) {
         this.create_elements();
         this.bind_events();
         this.set_tooltipontab(true);
+        this.set_timebeforetooltip(1200);
     };
 
 
@@ -622,6 +623,11 @@ var IPython = (function (IPython) {
     };
 
 
+    Notebook.prototype.set_timebeforetooltip = function (time) {
+        console.log("change time before tooltip to : "+time);
+        this.time_before_tooltip = time;
+    };
+
     Notebook.prototype.set_tooltipontab = function (state) {
         console.log("change tooltip on tab to : "+state);
         this.tooltip_on_tab = state;

IPython/frontend/html/notebook/templates/notebook.html

@@ -262,6 +262,12 @@
                     </span>
                     <span class="checkbox_label" id="tooltipontab_label">Tooltip on tab:</span>
                 </div>
+                <div class="section_row">
+                    <span id="tooltipontab_span">
+                        <input type="text" id="timebeforetooltip" value="1200"></input>
+                    </span>
+                    <span class="numeric_input_label" id="timebeforetooltip_label">Time before tooltip : </span>
+                </div>
             </div>
         </div>