change Load Tools icon that mods and staff use (#11169)

The crown icon makes it clearer to us that it's for the special
mod/staff tools. The pencil icon is too similar to normal
edit/compose icons and we were clicking it by mistake, with
accidental double-clicks resulting in users being briefly banned by
mistake since the ban icon is directly "under" the Load Tools icon.

I've checked with the other mods and they feel that the crown will
avoid that problem.

website/client/components/userMenu/profile.vue

@@ -14,7 +14,7 @@
         .svg-icon.positive-icon(v-html="icons.positive")
       button.btn.btn-secondary.positive-icon(v-if='this.userLoggedIn.contributor.admin && !adminToolsLoaded',
         @click="loadAdminTools()", v-b-tooltip.hover.right="'Admin - Load Tools'")
-        .svg-icon.positive-icon(v-html="icons.edit")
+        .svg-icon.positive-icon(v-html="icons.staff")
       span(v-if='this.userLoggedIn.contributor.admin && adminToolsLoaded')
         button.btn.btn-secondary.positive-icon(v-if='!hero.flags || (hero.flags && !hero.flags.chatRevoked)',
           @click="adminRevokeChat()", v-b-tooltip.hover.bottom="'Admin - Revoke Chat Privileges'")
@@ -407,7 +407,7 @@ import megaphone from 'assets/svg/broken-megaphone.svg';
 import lock from 'assets/svg/lock.svg';
 import challenge from 'assets/svg/challenge.svg';
 import member from 'assets/svg/member-icon.svg';
-import edit from 'assets/svg/edit.svg';
+import staff from 'assets/svg/tier-staff.svg';
 
 export default {
   props: ['userId', 'startingPage'],
@@ -430,7 +430,7 @@ export default {
         challenge,
         lock,
         member,
-        edit,
+        staff,
       }),
       adminToolsLoaded: false,
       userIdToMessage: '',