View Mask filter

Changes can be filtered to not trigger a build; if none of the files within a change are contained in the view mask, the build is filtered.

For example, with a View Mask Filter of:
`//depot/main/tests`
`-//depot/main/tests/001`

Case A (change will not be filtered, as index.xml is in the view mask):

Files:

- `//depot/main/tests/index.xml`
- `//depot/main/tests/001/test.xml`

Case B (change will not be filtered, as index.xml is in the view mask):

Files:

- `//depot/main/test/index.xml`
- `//depot/main/src/build.xml`

Case C (change will be filtered, as no file is in the view mask):

Files:

- `//depot/main/src/build.xml`

Case D (change will be filtered, as no file is in the view mask):

Files:

- `//depot/main/src/build.xml`
- `//depot/main/tests/001/test.xml`