Fix report dialog being illegible using mastodon-light theme (#17734)
Fix report dialog being illegible using mastodon-light theme (#17734)

Fixes #17726
maa123/mastodon,im-in-space/mastodon,musashino205/mastodon,koba-lab/mastodon,theoria24/mastodon,gol-cha/mastodon,cobodo/mastodon,pinfort/mastodon,yukimochi/mastodon,glitch-soc/mastodon,theoria24/mastodon,koba-lab/mastodon,gol-cha/mastodon,yukimochi/mastodon,maa123/mastodon,h3zjp/mastodon,koba-lab/mastodon,glitch-soc/mastodon,ykzts/mastodon,h3zjp/mastodon,glitch-soc/mastodon,Ryanaka/mastodon,cobodo/mastodon,ykzts/mastodon,Ryanaka/mastodon,MitarashiDango/mastodon,yukimochi/mastodon,theoria24/mastodon,pinfort/mastodon,masto-donte-com-br/mastodon,MitarashiDango/mastodon,yukimochi/mastodon,musashino205/mastodon,pinfort/mastodon,Ryanaka/mastodon,imas/mastodon,ykzts/mastodon,masto-donte-com-br/mastodon,tootcafe/mastodon,maa123/mastodon,gol-cha/mastodon,musashino205/mastodon,masto-donte-com-br/mastodon,gol-cha/mastodon,imas/mastodon,maa123/mastodon,imas/mastodon,h3zjp/mastodon,cobodo/mastodon,glitch-soc/mastodon,im-in-space/mastodon,masto-donte-com-br/mastodon,h3zjp/mastodon,pinfort/mastodon,cobodo/mastodon,Ryanaka/mastodon,im-in-space/mastodon,koba-lab/mastodon,im-in-space/mastodon,tootcafe/mastodon,tootcafe/mastodon,ykzts/mastodon,MitarashiDango/mastodon,imas/mastodon,MitarashiDango/mastodon,musashino205/mastodon,theoria24/mastodon,tootcafe/mastodon