Theme: missing strip.text.x parameter

[alshan]

... and few other parameters controlling appearance of facet labels:

strip.text.x,
strip.text.x.top, strip.text.x.bottom,
strip.text.y,
strip.text.y.left, strip.text.y.right

[OLarionova-HORIS]

Added:
strip_background_x, strip_background_y,
strip_text_x, strip_text_y
Commit: 2e82a65

[alshan]

Released in v4.5.0