Adjust position & alignment of the X axis labels for history graphs.
Adjust position & alignment of the X axis labels for history graphs.

This should keep the naming history graph readable until December;
after that it'll switch to showing the year only.
(It will get cramped in December though.)

fedora-python/portingdb,irushchyshyn/portingdb,irushchyshyn/portingdb,fedora-python/portingdb,irushchyshyn/portingdb,fedora-python/portingdb,irushchyshyn/portingdb