plot SOH channels in user's order

closes #110 (closed)

• Plot channels in order set in Channel Preferences.
• Move check not found channels here

documentation/07 _ Select SOH.help.md

@@ -72,4 +72,4 @@ channels in the data set.
 + "Save": Save any changes to database
 + "Save - Add to Main": Save any changes to database and add the selected
 Preferred SOH's name to Main Window so that its SOH list will be included when
-reading the data set.
\ No newline at end of file
+reading the data set and the SOH channel will be plotted in this order.
\ No newline at end of file