fix boot loop caused by competing wifi_manager and cmd_wifi

It is now possible to set a default autoexec command to automatically
join wifi when wifi_manager is disabled. To test wifi stability without
wifi_manager, use the following commands:

nvs_set bypass_wm str -v "1"
nvs_set autoexec str -v "1"
nvs_set autoexec1 str -v "squeezelite -o I2S -b 500:2000 -d all=info -m
nvs_set autoexec2 str -v "join <ssid> <password>"
ESP32"
restart

Note that squeezelite occupies the "autoexec1" slot to avoid conflicts
with the wifi manager web configuration page when it is re-enabled. To
re-enable the wifi-manager, use the following commands:

nvs_set bypass_wm str -v "0"
restart

--
Additional change:  Credits page now has a button to enable the nvs
editor even in ota mode

components/wifi-manager/code.js

@@ -28,7 +28,7 @@ var checkStatusInterval = null;
 
 var StatusIntervalActive = false;
 var RefreshAPIIntervalActive = false;
-
+var LastRecoveryState=null;
 var output = '';
 
 function stopCheckStatusInterval(){
@@ -176,6 +176,16 @@ $(document).ready(function(){
         $( "#wifi" ).slideDown( "fast", function() {})
     });
 
+    $("input#show-nvs").on("click", function() {
+        this.checked=this.checked?1:0;
+        if(this.checked){
+            $('a[href^="#tab-nvs"]').show();
+        } else {
+            $('a[href^="#tab-nvs"]').hide();
+        }
+
+    });
+    
     $("input#autoexec-cb").on("click", function() {
         var data = { 'timestamp': Date.now() };
         autoexec = (this.checked)?1:0;
@@ -628,12 +638,21 @@ function checkStatus(){
             enableStatusTimer = true;
         }
         if (data.hasOwnProperty('recovery')) {
+            if(LastRecoveryState != data["recovery"]){
+                LastRecoveryState = data["recovery"];
+                $("input#show-nvs")[0].checked=LastRecoveryState==1?true:false;
+            }
+            if($("input#show-nvs")[0].checked){
+                    $('a[href^="#tab-nvs"]').show();
+            } else{
+                $('a[href^="#tab-nvs"]').hide();
+            }
+
             if (data["recovery"] === 1) {
                 recovery = true;
                 $("#otadiv").show();
                 $('a[href^="#tab-audio"]').hide();
                 $('a[href^="#tab-gpio"]').show();
-                $('a[href^="#tab-nvs"]').show();
                 $("footer.footer").removeClass('sl');
                 $("footer.footer").addClass('recovery');
                 $("#boot-button").html('Reboot');
@@ -644,7 +663,6 @@ function checkStatus(){
                 $("#otadiv").hide();
                 $('a[href^="#tab-audio"]').show();
                 $('a[href^="#tab-gpio"]').hide();
-                $('a[href^="#tab-nvs"]').hide();
                 $("footer.footer").removeClass('recovery');
                 $("footer.footer").addClass('sl');
                 $("#boot-button").html('Recovery');

components/wifi-manager/index.html

@@ -300,7 +300,7 @@
                     <h2>Firmware URL:</h2>
                     <textarea id="fwurl" maxlength="350"></textarea>
                     <div class="buttons">
-                        <input type="button" id="flash" class="btn btn-danger" value="Flash!" /><span id="flash-status"></span>
+                    	<input type="button" id="flash" class="btn btn-danger" value="Flash!" /><span id="flash-status"></span>
                     </div>
                     <div id="otadiv">
                         <div class="progress" id="progress">
@@ -325,8 +325,12 @@
                             <li>cJSON, &copy; 2009-2017, Dave Gamble and cJSON contributors. Licensed under the MIT License.</li>
                         </ul>
                     </div>
+	                <h2>Show NVS Editor</h2>
+	                <div class="custom-control custom-switch">
+	                      <input type="checkbox" class="custom-control-input" id="show-nvs" checked="checked">
+	                      <label class="custom-control-label" for="show-nvs"></label>
+	                </div>
                 </div>
-
             </div>
             <footer class="footer"><span id="foot-fw"></span><span id="foot-wifi"></span></footer>
             <iframe width="0" height="0" border="0" name="dummyframe" id="dummyframe"></iframe>

components/wifi-manager/wifi_manager.c

@@ -543,14 +543,6 @@ char* wifi_manager_get_ap_list_json(){
 
 
 static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
-//    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
-//		led_blink_pushed(LED_GREEN, 250, 250);
-//        esp_wifi_connect();
-//        xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
-//    } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
-//		led_unpush(LED_GREEN);
-//        xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
-//    }
 
     if(event_base== WIFI_EVENT){
 		switch(event_id) {