Update German and compilation fix

- updated German texts
- fixed compilation error `initializer-string for array of chars is too long [-fpermissive]` by checking the end strings:

```
$ more language.h | grep -v ,
// [number of languages][number of texts][max. length of text]

static const char myLanguage[9][68][78] = {
    "Audio output"

    "Audio uitgang"

    "Audio output"

    "Audio izlaz"

    "Απαλοιφή θορύβου FM"
    "Έξοδος ήχου"

    "Audio output"

    "Audioausgabe"

    "Audio output"

    "Audio output"
};
```

src/language.h

@@ -346,7 +346,7 @@ static const char myLanguage[9][68][78] = {
     "Εμφάνιση squelch",
     "Μετρητής διαμόρφωσης",
     "Απαλοιφή θορύβου AM",
-    "Απαλοιφή θορύβου FM"
+    "Απαλοιφή θορύβου FM",
     "Οι προεπιλογές φορτώθηκαν",
     "Έξοδος ήχου"
   },
@@ -479,17 +479,18 @@ static const char myLanguage[9][68][78] = {
     "Versuche WLAN zu verbinden",
     "FEHLER.. WLAN deaktiviert",
     "VERBUNDEN!",
-    "Stationlist client IP",
+    "Stationlist Client IP",
-    "Show SW wavelength",
+    "Zeige KW-Wellenlänge",
-    "RDS filter",
+    "RDS-Filter",
-    "Dynamic PI",
+    "Dynamisches PI",
-    "Show squelch",
+    "Zeige Rauschsperre",
-    "Modulation meter",
+    "Modulationspegel",
-    "AM Noise blanker",
+    "AM Rauschunterdrücker",
-    "FM Noise blanker",
+    "UKW Rauschunterdrücker",
-    "Defaults loaded",
+    "Werkseinstellung geladen",
-    "Audio output"
+    "Audioausgabe"
   },
+
   { "Czech",                          // Czech
     "Směr enkóderu byl změněn",
     "Prosím, pusťte tlačítko",
@@ -558,8 +559,8 @@ static const char myLanguage[9][68][78] = {
     "FM Noise blanker",
     "Defaults loaded",
     "Audio output"
-
   },
+
   { "Slovak",                         // Slovak
     "Smer enkóderu bol zmenený",
     "Prosím, pusťte tlačidlo",