Moving the mgmt switch into the bottom section so it applies when

the user clicks apply on the specific vlan. In order for this to
work when the user is simultaneously changing the vlan that their
machine is connected through and the mgmt vlan id, we need to be
able to send a batch of commands through to the switch atomically
so the switch can process all of them and the momentary disconnection
of the machine doesn't matter

html/index.html

@@ -294,6 +294,9 @@ button.danger{background:var(--bad);color:#fff;border-color:transparent}
         <button class="ctl pri" id="vlan_add" data-i18n="v_add">Add a new VLAN</button>
       </div>
       <div class="card"><h2><span data-i18n="v_editor">VLAN editor</span> <span class="hint" id="vtitle"></span></h2>
+        <div><label class="row"><span class="lb" style="width:150px;" data-i18n="v_setmgmt_t"></span>
+          <span class="switch"><input type="checkbox" id="vmgmtpromote"><i></i></span>
+        </label></div>
         <div class="scrollx"><table class="t" id="vedit"><tbody></tbody></table></div>
         <div style="margin-top:10px"><button class="ctl pri" id="vapply" data-i18n="c_apply">Apply</button></div>
         <p class="small mut" style="margin-top:6px" data-i18n="v_legend">U = untagged member, T = tagged member, - = not a member. PVID assigns this VLAN to untagged ingress traffic.</p>