added back navigation for trace

Author: NickIliev

app/trace/custom-trace-writer/custom-tracewriter-example.component.html

@@ -1,4 +1,4 @@
-<GridLayout class="border-gridLayout">
+<GridLayout sdkExampleTitle sdkToggleNavButton class="border-gridLayout">
     <ListView [items]="customwriter.array" class="list-group">
         <template let-item="item" let-odd="odd" let-even="even">
             <GridLayout rows="auto auto auto auto" columns="auto *" class="list-group-item">

app/trace/trace-specific-categories/trace-specific-categories-example.component.html

@@ -1,4 +1,4 @@
-<StackLayout>
+<StackLayout sdkExampleTitle sdkToggleNavButton>
     <Label class="h3 m-15 text-center" text="Tracing specific categories of events example." textWrap="true"></Label>
     <Button class="btn btn-primary btn-rounded-sm btn-active" text="Enable tracing" (tap)="enableTracing()"></Button>
     <Button class="btn btn-primary btn-rounded-sm btn-active" text="Disable tracing" (tap)="disableTracing()"></Button>