Minor style edits in subscribe dialog

src/app/dialogs/subscribe-dialog/subscribe-dialog.component.html

@@ -25,8 +25,9 @@
                 <mat-checkbox [(ngModel)]="download_all"><ng-container i18n="Download all uploads subscription setting">Download all uploads</ng-container></mat-checkbox>
             </div>
             <div class="col-12" *ngIf="!download_all">
-                <ng-container i18n="Download time range prefix">Download videos uploaded in the last</ng-container>
-                <mat-form-field color="accent" style="width: 50px; text-align: center; margin-left: 10px;">
+                <span i18n="Download time range prefix">Download videos uploaded in the last</span>
+                <div>
+                    <mat-form-field color="accent" style="width: 100px; text-align: center;">
                         <input type="number" matInput [(ngModel)]="timerange_amount">
                     </mat-form-field>
                     <mat-form-field class="unit-select">
@@ -37,6 +38,7 @@
                         </mat-select>
                     </mat-form-field>
                 </div>
+            </div>
             <div class="col-12 mt-2">
                 <mat-form-field>
                     <mat-label i18n="Max quality">Max quality</mat-label>

src/app/dialogs/subscribe-dialog/subscribe-dialog.component.scss

@@ -1,5 +1,5 @@
 .unit-select {
-    width: 75px;
+    width: 100px;
     margin-left: 20px;
 }