Removed prefix chars, fixed issues related to custom font mappings

src/screen.cpp

@@ -717,7 +717,7 @@ void DebugInfo::drawFrame(OLEDDisplay *display, OLEDDisplayUiState *state, int16
     }
 
     const char *fields[] = {channelStr, nullptr};
-    uint32_t yo = drawRows(display, x, y + 12, fields);
+    uint32_t yo = drawRows(display, x, y + FONT_HEIGHT, fields);
 
     display->drawLogBuffer(x, yo);
 }

src/screen.h

@@ -168,13 +168,16 @@ class Screen : public PeriodicTask
         switch (last) {    // conversion depnding on first UTF8-character
             case 0xC2: { SKIPREST = false; return (uint8_t) ch; }
             case 0xC3: { SKIPREST = false; return (uint8_t) (ch | 0xC0); }
-            case 0x82: { SKIPREST = false; if (ch == 0xAC) return (uint8_t) 0x80; }   // special case Euro-symbol
         }
+
+        // We want to strip out prefix chars for two-byte char formats
+        if (ch == 0xC2 || ch == 0xC3 || ch == 0x82) return (uint8_t) 0;
+
         // If we already returned an unconvertable-character symbol for this unconvertable-character sequence, return NULs for the rest of it
         if (SKIPREST) return (uint8_t) 0;
         SKIPREST = true;
 
-        return (uint8_t) 0xA8; // otherwise: return ¿ if character can't be converted
+        return (uint8_t) 191; // otherwise: return ¿ if character can't be converted (note that the font map we're using doesn't stick to standard EASCII codes)
     }
 
     /// Returns a handle to the DebugInfo screen.