#641 fixes and additions. (#646)

Name a lot of text labels according to our conventions

engine/pokemon/mail.asm

@@ -428,7 +428,7 @@ MailboxPC:
 	jp CloseSubmenu
 
 .PutInPack:
-	ld hl, .MessageLostText
+	ld hl, .MailMessageLostText
 	call MenuTextbox
 	call YesNoBox
 	call ExitMenu
@@ -441,7 +441,7 @@ MailboxPC:
 	ld hl, wNumItems
 	call ReceiveItem
 	jr c, .put_in_bag
-	ld hl, .PackFullText
+	ld hl, .MailPackFullText
 	jp MenuTextboxBackup
 
 .put_in_bag
@@ -449,19 +449,19 @@ MailboxPC:
 	dec a
 	ld b, a
 	call DeleteMailFromPC
-	ld hl, .PutAwayText
+	ld hl, .MailClearedPutAwayText
 	jp MenuTextboxBackup
 
-.PutAwayText:
-	text_far ClearedMailPutAwayText
+.MailClearedPutAwayText:
+	text_far _MailClearedPutAwayText
 	text_end
 
-.PackFullText:
-	text_far MailPackFullText
+.MailPackFullText:
+	text_far _MailPackFullText
 	text_end
 
-.MessageLostText:
-	text_far MailMessageLostText
+.MailMessageLostText:
+	text_far _MailMessageLostText
 	text_end
 
 .GetMailType:
@@ -500,12 +500,12 @@ MailboxPC:
 	ld a, [hl]
 	and a
 	jr z, .attach_mail
-	ld hl, .HoldingMailText
+	ld hl, .MailAlreadyHoldingItemText
 	call PrintText
 	jr .try_again
 
 .egg
-	ld hl, .EggText
+	ld hl, .MailEggText
 	call PrintText
 	jr .try_again
 
@@ -514,22 +514,22 @@ MailboxPC:
 	dec a
 	ld b, a
 	call MoveMailFromPCToParty
-	ld hl, .MailMovedText
+	ld hl, .MailMovedFromBoxText
 	call PrintText
 
 .exit2
 	jp CloseSubmenu
 
-.HoldingMailText:
-	text_far MailAlreadyHoldingItemText
+.MailAlreadyHoldingItemText:
+	text_far _MailAlreadyHoldingItemText
 	text_end
 
-.EggText:
-	text_far MailEggText
+.MailEggText:
+	text_far _MailEggText
 	text_end
 
-.MailMovedText:
-	text_far MailMovedFromBoxText
+.MailMovedFromBoxText:
+	text_far _MailMovedFromBoxText
 	text_end
 
 .Cancel: