don't use tabs for indenting
use require when including a file unconditionally
improve coding style : correct syntax with if-then-else statements
wrap long lines
Translated using Weblate (Korean)

Currently translated at 39.0% (1014 of 2602)
Merge remote-tracking branch 'origin/master'
improve coding style : correct syntax with if-then-else statements
wrap long lines
Add spline charts back
Use jQuery extend for options merging
More space needed due to increase of chart types
Merge branch 'master' into charts

Conflicts:
	tbl_chart.php