Disabling quarterly ticks also disables x labels

[HomoCodens]

library(tstools)
x <- ts(1:10, start = 1900)
tsplot(x, theme = init_tsplot_theme(quarterly_ticks = FALSE))

[HomoCodens]

Or is this intended?
i.e. label_pos = "mid" is not "allowed" without quarterly ticks?

 library(tstools)
 x <- ts(1:10, start = 1900)
 tsplot(x, theme = init_tsplot_theme(quarterly_ticks = FALSE, label_pos = "start"))

[HomoCodens]

I'm going to mark this down as "feature, not bug" for now.

It would probably be possible to draw the labels centered by adding invisible quarterly ticks.

[HomoCodens]

Giving it another open for discussion as the first case where it matters came up: the IVU reports.