Pre-Release v2.3.8824

What's Changed

Several bugfixes for when the NUT server is reporting unexpected, out-of-range values (see also #131). In addition;

• Fixed an issue where log file controls were enabled when logging was not enabled, and the log file was not present
• Fixed being unable to change update interval value, reinforced units as milliseconds throughout the program
• Fixed WinNUT titlebar being blank
• The Import Old Preferences File menu item now enables and disables correctly
• UPS variables now default to an obvious out of range value (-1) to indicate that there was a problem retrieving them. I don't have an optimal solution for handling missing variables implemented yet; see #116 for more info
• Battery charge and run time value calculations will also now correctly fail if there are any missing variables required for the calculations

Full Changelog: v2.3.8800...v2.3.8824