Provide focus property to Ruida driver

Focus is not in use as of yet (will follow in a future commit), however this commit already implements the necessary UI changes and cleans up a now-obsolete (partially) redundant class.

src/main/java/de/thomas_oster/liblasercut/FloatMinMaxPowerSpeedFrequencyProperty.java → src/main/java/de/thomas_oster/liblasercut/FloatMinMaxPowerSpeedFocusFrequencyProperty.java

@@ -27,27 +27,15 @@
  * Add 'min power' to FloatPowerSpeedFrequencyProperty
  */
 
-public class FloatMinMaxPowerSpeedFrequencyProperty extends FloatPowerSpeedFrequencyProperty {
+public class FloatMinMaxPowerSpeedFocusFrequencyProperty extends FloatPowerSpeedFocusFrequencyProperty {
 
   private float min_power = 10.0f;
   private static final String MIN_POWER = "min power";
 
-  public FloatMinMaxPowerSpeedFrequencyProperty()
+  public FloatMinMaxPowerSpeedFocusFrequencyProperty()
   {
     super();
   }
-
-  public FloatMinMaxPowerSpeedFrequencyProperty(LaserProperty o)
-  {
-    for (String k : o.getPropertyKeys())
-    {
-      Object p;
-      p = o.getProperty(k);
-      if (p != null) {
-        this.setProperty(k, p);
-      }
-    }
-  }
 
   /**
    * Get the value of min power
@@ -128,9 +116,9 @@ public void setProperty(String name, Object value)
   }
 
   @Override
-  public FloatMinMaxPowerSpeedFrequencyProperty clone()
+  public FloatMinMaxPowerSpeedFocusFrequencyProperty clone()
   {
-    FloatMinMaxPowerSpeedFrequencyProperty result = new FloatMinMaxPowerSpeedFrequencyProperty();
+    FloatMinMaxPowerSpeedFocusFrequencyProperty result = new FloatMinMaxPowerSpeedFocusFrequencyProperty();
     Object p;
     for (String s:this.getPropertyKeys())
     {
@@ -147,10 +135,10 @@ public boolean equals(Object obj) {
     if (obj == null) {
       return false;
     }
-    if (!(obj instanceof FloatMinMaxPowerSpeedFrequencyProperty)) {
+    if (!(obj instanceof FloatMinMaxPowerSpeedFocusFrequencyProperty)) {
       return false;
     }
-    final FloatMinMaxPowerSpeedFrequencyProperty other = (FloatMinMaxPowerSpeedFrequencyProperty) obj;
+    final FloatMinMaxPowerSpeedFocusFrequencyProperty other = (FloatMinMaxPowerSpeedFocusFrequencyProperty) obj;
     if (this.min_power != other.min_power) {
       return false;
     }