MI - dec control plus debug (#4)

* restructure serial debug output (partly) 

+ MI - more code review

* fix debug output for power control cmds

* MI - limitation commands answered

* Debug - add more macros and texts

Might as well help for https://github.com/lumapu/ahoy/pull/478

Unfortunately, this atm doesn't really lower used flash memory

* MI - limit command

- now seems to work for MI-600 (to be verified)
- debug - more use of macros (wrt. to real effect see last remark)

src/hm/hmInverter.h

@@ -143,7 +143,10 @@ class Inverter {
         template <typename T>
         void enqueCommand(uint8_t cmd) {
            _commandQueue.push(std::make_shared<T>(cmd));
-           DPRINTLN(DBG_INFO, F("(#") + String(id) + F(") enqueuedCmd: 0x") + String(cmd, HEX));
+           DPRINTHEAD(DBG_INFO, id);
+           //DBGPRINTLN(F("enqueuedCmd: 0x") + String(cmd, HEX));
+           DBGPRINT_TXT(TXT_ENQUCMD);
+           DBGHEXLN(cmd);
         }
 
         void setQueuedCmdFinished() {