Fix GetSettings - Ignore nameless values & trim values.

[CharlesNRU]

Hello,

2 things in this pull request:

1. On some models, GetSettings would return a bunch of BIOS settings which have a name value of a space character. So I filter those out.
2. When trying to identify the setting, sometimes there is a space at the beginning of the value so it cannot identify correctly the current value so I added a Trim() to the value to remove the extra spaces.

[CharlesNRU]

Added a commit because I found a similar issue with getting current values before setting BIOS settings.