Disable a button during page load (#10148)

The people screen has a button that can be clicked to open a modal for
inviting new users to an organization. This modal depends on data from
the people list for conditional logic, like whether or not the seat count
cor the organization has been reached. If the modal is opened before the
people list loads these conditions can not process correctly, causing
bugs.

This commit disabled the button until the people list loads to prevent
this kind of behavior.

apps/web/src/app/admin-console/organizations/members/members.component.html

@@ -5,7 +5,7 @@
     [placeholder]="'searchMembers' | i18n"
   ></bit-search>
 
-  <button type="button" bitButton buttonType="primary" (click)="invite()">
+  <button type="button" bitButton buttonType="primary" (click)="invite()" [disabled]="!firstLoaded">
     <i class="bwi bwi-plus bwi-fw" aria-hidden="true"></i>
     {{ "inviteMember" | i18n }}
   </button>