Fix the issue where a female-only Pokemon's icon are not displayed in lists if no male icon is set

[Aelysya]

Description

This PR fixes an issue where a Pokémon's icon would not display in some lists when it has no male icon set even if it is female-only.

Note before testing

• Go to a female-only Pokémon database page (like Nidoqueen)
• Set the female encounter rate to less than 100%
• Go to the Resource tab
• Remove the male icon in the Icons section
• Set the female rate back to 100%

Tests to perform

• The Pokémon's icon should be displayed in the Pokédex page
• The Pokémon's icon should be displayed in the "Pokémon with the abitlity X" page
• The Pokémon's icon should be displayed in the "Pokémon with the move Y" page
• The Pokémon's icon should be displayed in the "Pokémon with the type Z" page