Remove old log files before a new run. If a pull request has left old files around and the check for changes script tells it not to run then Jenkins will use the old files

clang-format MantidPlot, MantidQt and Vates

- New author name
- Minor bug fix after release notes were migrated to docs

Conflicts:
	docs/source/release/index.rst

Remove unused functions from application window

Revert pylint output format change

Qt3 warnings group 8

use back() member function to get the last element of a container.

Pylint claims the msg-template option produces the same output as the
old parseable format but the Jenkins plugin seems to ignore it all.

3.7.0 was a not released at all.

 fabs for line grids which can be backward

Move VSI Check to ApplicationWindow.

Expose MultipleFileProperty constructor to python