Sync Interfaces settings: hide sections for disabled features (#2865)

* Add network debug printer

* hide settings for disabled features

If not enabled at compile time, this change hides "Sync interfaces" settings for Alexa, MQTT, Blynk, HueSync.
The html sections are just hidden by a <div> with style display:none.

* Update Animated Staircas for 0.14

* Faster strip updates.

* Add ESP32 variant display in update page.

* Net debug optimizations

Fix ESP8266 (unaligned progmem flash string reads)
Do not send an extra package for \n in println
Only resolve IP/hostname once

* Compile time option for PIR sensor off timer

* Fix Gitpod compiling (#2875)

* Install Platformio not in Gitpod Image

* Install platformio at runtime

remove outdated extensions

* Bugfix for color transitioning.
Return palette option for Candle.
Fix for "* Color..." palette hiding.
Comment out debug output.

* Optimization & bugfix for net debug.
- Inherited from Print class.
- Added UI option to disable net  debug output.

* Reduce fxdata size by about 200 bytes

Removed redundant commas before semicolon delimiter (`,;` -> `;`)
No need to transmit `@` in /json/fxdata

* NetworkDebugPrinter packet optimization.

* Revert NetworkDebugPrinter changes.

* Remove flush() in bus manager.

* Optimizations.

Co-authored-by: Shaheen Gandhi <shaheen@fb.com>
Co-authored-by: Blaz Kristan <blaz@kristan-sp.si>
Co-authored-by: cschwinne <dev.aircoookie@gmail.com>
Co-authored-by: Jason2866 <24528715+Jason2866@users.noreply.github.com>

wled00/data/settings_um.htm

@@ -106,7 +106,7 @@
 	}
 	function addField(k,f,o,a=false) {  //key, field, (sub)object, isArray
 		if (isO(o)) {
-			urows += '<hr style="width:260px">';
+			urows += '<hr class="sml">';
 			for (const [s,v] of Object.entries(o)) {
 				// possibility to nest objects (only 1 level)
 				if (f!=='unknown' && !k.includes(":")) addField(k+":"+f,s,v);
@@ -236,7 +236,7 @@
 		<i style="color: orange;">(only changable on ESP32, change requires reboot!)</i><br>
 		SDA:<input type="number" min="-1" max="48" name="SDA" onchange="check(this,'if')" class="s" placeholder="SDA">
 		SCL:<input type="number" min="-1" max="48" name="SCL" onchange="check(this,'if')" class="s" placeholder="SCL">
-		<hr style="width:260px">
+		<hr class="sml">
 		Global SPI GPIOs (HW)<br>
 		<i style="color: orange;">(only changable on ESP32, change requires reboot!)</i><br>
 		MOSI:<input type="number" min="-1" max="48" name="MOSI" onchange="check(this,'if')" class="s" placeholder="MOSI">