Update help documents

Update the following help documents:

• 04 _ Search List of Directories.help.md: Add instruction on limiting the time period to plot
• 40 _ Firmware Notice.help.md: Update list of channels affected by the old Pegasus firmware versions problem and add instruction on how to fix the problem

sohstationviewer/documentation/01 _ Table of Contents.help.md

@@ -52,7 +52,11 @@ The home button can be used to return to this page at any time.
 
 + [GPS Dialog](30%20_%20GPS%20Dialog.help.md)
 
-+ [View-Edit Database Tables](31%20_%20View-Edit%20Database%20Tables.help.md)
++ [Reset Database](31%20_%20Reset%20Database.help.md)
+
++ [Options Menu](32%20_%20Options%20Menu.help.md)
+
++ [View-Edit Database Tables](33%20_%20View-Edit%20Database%20Tables.help.md)
 
 + [Firmware Notice](40%20_%20Firmware%20Notice.help.md)