refactor(circular progress): change method names

Author: didimmova

src/app/data-display/circular-progressbar/circular-dynamic-sample/circular-dynamic-sample.component.html

@@ -16,10 +16,10 @@
         </igx-circular-bar>
 
         <div class="button-container">
-            <button igxButton="icon" (click)="removeProgress()">
+            <button igxButton="icon" (click)="decrementProgress()">
                 <igx-icon fontSet="material">remove</igx-icon>
             </button>
-            <button igxButton="icon" (click)="addProgress()">
+            <button igxButton="icon" (click)="incrementProgress()">
                 <igx-icon fontSet="material">add</igx-icon>
             </button>
         </div>

src/app/data-display/circular-progressbar/circular-dynamic-sample/circular-dynamic-sample.component.ts

@@ -13,14 +13,14 @@ export class CircularDynamicSampleComponent implements OnInit {
         this.currentValue = 0;
     }
 
-    public addProgress() {
+    public incrementProgress() {
         this.currentValue += 10;
         if (this.currentValue > 100) {
             this.currentValue = 100;
         }
     }
 
-    public removeProgress() {
+    public decrementProgress() {
         this.currentValue -= 10;
         if (this.currentValue < 0) {
             this.currentValue = 0;