misspell: Corrected some misspelled words

If there are too many ticks generated for the y-axis (which can occur
for log scale 2, with a small y-min and a large max), then the ticks
will be regenerated using larger jumps between the ticks.

This also handles the case when y-min is set to 0. Previously, y-min of
0 was ignored as zero is not a valid value for log scale. Now the tick
generator approximates zero by setting min to 0.1.

Ref #8244

Ref #8516

* Update to latest oauth2 library using govendor

* Follow API changes

I added in a description since there was just TODO there originally.

chrome: an attempt to fix scroll issue with chrome, but this did not fix the problem as it seems to be caused by some interaction between graph rendering and scrolling, #8494

* remove X-Forwarded-* headers added by nginx when proxying data source & plugin requests

* properly handle X-Forwarded-For

fixes #8446. Data with all values equal to zero, creates a max with the
value of Infinite. The for loop for creating ticks then gets stuck in an
infinite loop. This fix resets min and max and creates some fake ticks
for the y-axis if the min and max are not finite numbers.

Resolves issue #8467

fixes #8446. Data with all values equal to zero, creates a max with the
value of Infinite. The for loop for creating ticks then gets stuck in an
infinite loop. This fix resets min and max and creates some fake ticks
for the y-axis if the min and max are not finite numbers.

- Move export csv options to modal dialog

Adds series override options for dash spaces and dash length.