Improve style and wording

apps/client/src/app/components/dialog-footer/dialog-footer.component.html

@@ -1,6 +1,5 @@
 <button
   *ngIf="deviceType === 'mobile'"
-  class="mt-2"
   mat-button
   (click)="onClickCloseButton()"
 >

apps/client/src/app/components/dialog-footer/dialog-footer.component.scss

@@ -1,7 +1,9 @@
 :host {
   display: flex;
   flex: 0 0 auto;
-  margin-bottom: 0;
   min-height: 0;
+
+  @media (min-width: 576px) {
     padding: 0 !important;
   }
+}

apps/client/src/app/components/position/position-detail-dialog/position-detail-dialog.html

@@ -155,16 +155,18 @@
           [isDate]="true"
           [locale]="data.locale"
           [value]="firstBuyDate"
-          >First Buy Date</gf-value
+          >First Activity</gf-value
         >
       </div>
       <div class="col-6 mb-3">
         <gf-value
-          i18n
           size="medium"
           [locale]="data.locale"
           [value]="transactionCount"
-          >Transactions</gf-value
+          ><ng-container *ngIf="transactionCount === 1">Activity</ng-container
+          ><ng-container *ngIf="transactionCount !== 1"
+            >Activities</ng-container
+          ></gf-value
         >
       </div>
       <div class="col-6 mb-3">