Rendering Estimation Graph / #5935

There no Estimation Graph is rendered for tasks that have
Estimated time set but Estimated worst not.

Estimation Graph needs to be rendered for every task that have Estimated time set.

To solve this problem you can a pretty simple code change.
Just change this piece of code:

from render\render_misc.inc.php

function renderEstimationGraph($estimated, $estimated_max, $completion)
{
...
        $estimated_max= $estimated_max/60/60;

With this code:

from render\render_misc.inc.php

function renderEstimationGraph($estimated, $estimated_max, $completion)
{
...
        $estimated_max = $estimated_max == 0
                          ? $estimated
                          : $estimated_max/60/60;