feat: add placeholders (#520)

Author: khalatevarun

src/app/shared/dialogs/screen-clip-options/screen-clip-options.component.html

@@ -94,7 +94,9 @@ <h2 mat-dialog-title class="title">
                 <input autocomplete="off"
                        formControlName="animationInDuration"
                        matInput #animationInDuration
-                       type="number">
+                       type="number"
+                       placeholder="777"
+                       >
 
                 <span matSuffix>ms</span>
               </mat-form-field>
@@ -123,7 +125,9 @@ <h2 mat-dialog-title class="title">
                 <input autocomplete="off"
                        formControlName="animationOutDuration"
                        matInput #animationOutDuration
-                       type="number">
+                       type="number"
+                       placeholder="777"
+                       >
 
                 <span matSuffix>ms</span>
               </mat-form-field>