Stop LedDevice:write for disabled devices + Nanoleaf Fixes (#629)

* Handle Exceptions in main & Pythoninit

* Have SSDPDiscover generic again

* Have SSDPDiscover generic again

* Change Info- to Debug logs as technical service messages

* Nanoleaf - When switched on, ensure UDP mode

* Include SQL Database in Cross-Compile instructions

* Fix Clazy (QT code checker) and clang Warnings

* Stop LedDevice:write for disabled device

* Nanoleaf: Fix uint printfs

* NanoLeaf: Fix indents to tabs

* NanoLeaf - Add debug verbosity switches

* Device switchability support, FileDevice with timestamp support

* Nanoleaf Light Panels now support External Control V2

* Enhance LedDeviceFile by Timestamp + fix readyness

* Stop color stream, if LedDevice disabled

* Nanoleaf - remove switchability

libsrc/leddevice/schemas/schema-file.json

@@ -17,6 +17,13 @@
 			"maximum": 1000,
 			"access" : "expert",
 			"propertyOrder" : 2
+		},
+		"printTimeStamp": {
+			"type": "boolean",
+			"title":"edt_dev_spec_printTimeStamp_title",
+			"default": false,
+			"access" : "expert",
+			"propertyOrder" : 3
 		}
 	},
 	"additionalProperties": true