Chore: Updated mat inputs to better match the style guide. Removed placeholders in favour of labels.

overlord/src/app/cost-centre/cost-centre-detail/cost-centre-detail.component.html

@@ -7,13 +7,7 @@
       <div class="flex flex-row justify-around content-start items-start">
         <mat-form-field class="flex-auto">
           <mat-label>Name</mat-label>
-          <input
-            matInput
-            #nameElement
-            placeholder="Name"
-            formControlName="name"
-            (keyup.enter)="save()"
-          />
+          <input matInput #nameElement formControlName="name" (keyup.enter)="save()" />
         </mat-form-field>
       </div>
     </form>