Apply #pragma once, misc cleanup (#12322)

* Apply #pragma once in headers
* Adjust some thermistors formatting
* Misc cleanup and formatting

Marlin/src/lcd/language/language_jp-kana.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Japanese (Kana)
@@ -29,9 +30,6 @@
  *
  */
 
-#ifndef LANGUAGE_KANA_UTF_H
-#define LANGUAGE_KANA_UTF_H
-
 #define DISPLAY_CHARSET_ISO10646_KANA
 #define CHARSIZE 3
 
@@ -221,5 +219,3 @@
 #define MSG_FILAMENT_CHANGE_LOAD_2          _UxGT("シバラクオマチクダサイ")            // "filament load"
 #define MSG_FILAMENT_CHANGE_RESUME_1        _UxGT("プリントヲサイカイシマス")           // "Wait for print"
 #define MSG_FILAMENT_CHANGE_RESUME_2        _UxGT("シバラクオマチクダサイ")            // "to resume"
-
-#endif // LANGUAGE_KANA_UTF_H