fix issue #303

Author: kinfkong

src/app/app.component.html

@@ -110,7 +110,7 @@
                class="common-font-color"
                autocomplete="off"
                placeholder="{{!currentInstance ?'Please select a redis instance to enter redis command'
-        : 'Enter Redis command'}}" value=""
+        : 'Enter Redis Command Here'}}" value=""
                (keydown)="onCliInputKeyDown($event)"
                [(ngModel)]="cliInputValue"
                (focus)="onCliInputFocus()"