Improve accuracy of large export warning (#1142)

* Improve accuracy of large export warning

The surrounding code checks for a limit of exactly 20,000 bytes and then
hardcodes the limit as being "20 kB" in the locale string. When
formatting, we were dividing by 1024 rather than 1000 and so when
breaching the limit we could end up showing values that were smaller
than 20 kB.

* We're also dividing stupidly elsewhere

totalRP3/Core/Profiles.lua

@@ -349,11 +349,11 @@ local function onActionSelected(value, button)
 		local serial = Utils.serial.serialize({Globals.version, profileID, profile });
 		if serial:len() < 20000 then
 			TRP3_ProfileExport.content.scroll.text:SetText(serial);
-			TRP3_ProfileExport.content.title:SetText(loc.PR_EXPORT_NAME:format(profile.profileName, serial:len() / 1024));
+			TRP3_ProfileExport.content.title:SetText(loc.PR_EXPORT_NAME:format(profile.profileName, serial:len() / 1000));
 			TRP3_ProfileExport:Show();
 			TRP3_ProfileExport.content.scroll.text:SetFocus();
 		else
-			Utils.message.displayMessage(loc.PR_EXPORT_TOO_LARGE:format(serial:len() / 1024), 2);
+			Utils.message.displayMessage(loc.PR_EXPORT_TOO_LARGE:format(serial:len() / 1000), 2);
 		end
 	elseif value == PROFILEMANAGER_ACTIONS.IMPORT then
 		TRP3_ProfileImport.profileID = profileID;