enhanced plugin support (#634)

- refactored admin controller and templates
- plugin support for entity actions
- changed column mail to email in customer table
- refactored theme events

src/Entity/Timesheet.php

@@ -13,8 +13,6 @@ use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Timesheet entity.
- *
  * @ORM\Table(
  *     name="timesheet",
  *     indexes={
@@ -109,7 +107,7 @@ class Timesheet
     /**
      * @var float
      *
-     * @ORM\Column(name="rate", type="decimal", precision=10, scale=2, nullable=false)
+     * @ORM\Column(name="rate", type="float", precision=10, scale=2, nullable=false)
      * @Assert\GreaterThanOrEqual(0)
      */
     private $rate = 0.00;
@@ -117,7 +115,7 @@ class Timesheet
     /**
      * @var float
      *
-     * @ORM\Column(name="fixed_rate", type="decimal", precision=10, scale=2, nullable=true)
+     * @ORM\Column(name="fixed_rate", type="float", precision=10, scale=2, nullable=true)
      * @Assert\GreaterThanOrEqual(0)
      */
     private $fixedRate = null;
@@ -125,7 +123,7 @@ class Timesheet
     /**
      * @var float
      *
-     * @ORM\Column(name="hourly_rate", type="decimal", precision=10, scale=2, nullable=true)
+     * @ORM\Column(name="hourly_rate", type="float", precision=10, scale=2, nullable=true)
      * @Assert\GreaterThanOrEqual(0)
      */
     private $hourlyRate = null;
@@ -211,7 +209,7 @@ class Timesheet
 
         if (null === $end) {
             $this->duration = 0;
-            $this->rate = 0;
+            $this->rate = 0.00;
         } else {
             $this->timezone = $end->getTimezone()->getName();
         }
@@ -298,8 +296,6 @@ class Timesheet
     }
 
     /**
-     * Set description
-     *
      * @param string $description
      * @return Timesheet
      */
@@ -311,8 +307,6 @@ class Timesheet
     }
 
     /**
-     * Get description
-     *
      * @return string
      */
     public function getDescription()
@@ -321,8 +315,6 @@ class Timesheet
     }
 
     /**
-     * Set rate
-     *
      * @param float $rate
      * @return Timesheet
      */
@@ -334,8 +326,6 @@ class Timesheet
     }
 
     /**
-     * Get rate
-     *
      * @return float
      */
     public function getRate()