Optimization for `cot_themes_info()`
Optimization for `cot_themes_info()`

* made faster in case certain Theme name defined

related to 15b8bea (#1485)

Roffun/Cotonti,Cotonti/Cotonti,Roffun/Cotonti,Cotonti/Cotonti,Cotonti/valencia,Cotonti/Cotonti,Cotonti/valencia,Cotonti/valencia,Roffun/Cotonti