fixed minor animation issue in gauge-widgets

ui/src/app/widget/lib/analogue-compass.js

@@ -104,7 +104,9 @@ export default class TbAnalogueCompass {
                 var tvPair = cellData.data[cellData.data.length -
                 1];
                 var value = tvPair[1];
-                this.gauge.value = value;
+                if(value !== this.gauge.value) {
+                    this.gauge.value = value;
+                }
             }
         }
     }

ui/src/app/widget/lib/analogue-linear-gauge.js

@@ -212,7 +212,9 @@ export default class TbAnalogueLinearGauge {
                 var tvPair = cellData.data[cellData.data.length -
                 1];
                 var value = tvPair[1];
-                this.gauge.value = value;
+                if(value !== this.gauge.value) {
+                    this.gauge.value = value;
+                }
             }
         }
     }

ui/src/app/widget/lib/analogue-radial-gauge.js

@@ -221,7 +221,9 @@ export default class TbAnalogueRadialGauge {
                 var tvPair = cellData.data[cellData.data.length -
                 1];
                 var value = tvPair[1];
-                this.gauge.value = value;
+                if(value !== this.gauge.value) {
+                    this.gauge.value = value;
+                }
             }
         }
 

ui/src/app/widget/lib/canvas-digital-gauge.js

@@ -204,7 +204,9 @@ export default class TbCanvasDigitalGauge {
                     this.gauge.options.label = timestampDisplayValue;
                 }
                 var value = tvPair[1];
-                this.gauge.value = value;
+                if(value !== this.gauge.value) {
+                    this.gauge.value = value;
+                }
             }
         }
     }