Budget graph in project details (#3406)

* do not copy description if restarting via calendar
* added support to display negative durations
* fix charts for larger numbers

tests/Utils/DurationTest.php

@@ -23,7 +23,6 @@ class DurationTest extends TestCase
 
         $this->assertNull($sut->format(null));
         $this->assertEquals('02:38', $sut->format(9494));
-        $this->assertEquals('02:38:14', $sut->format(9494, Duration::FORMAT_WITH_SECONDS));
     }
 
     /**