add shader detail very high option

[AdamTadeusz]

Description

See issue for description

Linked Issues

• fixes Missing Shader detail option #1074

[AdamTadeusz]

@nullsystem following this convention for water detail and shadow detail, we should set the label for shader detail to very high if r_lightmap_bicubic is set to 1, without then checking what mat_reducefillrate is set to. Wouldn't it be a good idea however to somehow indicate to the player that, if for example both r_lightmap_bicubic and mat_reducefillrate is set to 1 that even though the value is set to "Very High", that the graphical settings aren't at their highest?

[AdamTadeusz]

I guess thats not really a big issue, updating a single setting should update all of these convars that could have a conflict to the values they are supposed to have

[nullsystem]

@AdamTadeusz I wouldn't bother with that specific case, it's basically an "odd" setting if it has it likely if the player somewhat tweaked both of those settings. Just let it do "very high".