message: Update culture_ideas.gfx
  Better icons (from vanilla) for German (removed Nazism), Undead, Horse, and Noculture (for this latter, used the "error dog")
diff: @@ -536,7 +536,7 @@ spriteTypes = {
  spriteType = {
  name = "GFX_idea_culture_german"
  - texturefile = "gfx/interface/goals/focus_chi_mission_to_germany.dds"
  + texturefile = "gfx/interface/ideas/idea_ger_rebuild_the_nation.dds"
  }
  spriteType = {
  @@ -606,7 +606,7 @@ spriteTypes = {
  spriteType = {
  name = "GFX_idea_culture_horse"
  - texturefile = "gfx/interface/goals/goal_generic_cavalry.dds"
  + texturefile = "gfx/interface/ideas/idea_porsche.dds"
  }
  spriteType = {
  @@ -1046,7 +1046,7 @@ spriteTypes = {
  spriteType = {
  name = "GFX_idea_culture_noculture"
  - texturefile = "gfx/interface/ideas/idea_chi_incompetent_officers.dds"
  + texturefile = "gfx/interface/thisisdog.dds"
  }
  spriteType = {
  @@ -1061,7 +1061,7 @@ spriteTypes = {
  spriteType = {
  name = "GFX_idea_culture_north_german"
  - texturefile = "gfx/interface/goals/focus_chi_mission_to_germany.dds"
  + texturefile = "gfx/interface/ideas/idea_ger_rebuild_the_nation.dds"
  }
  spriteType = {
  @@ -1556,7 +1556,7 @@ spriteTypes = {
  spriteType = {
  name = "GFX_idea_culture_undead"
  - texturefile = "gfx/interface/goals/focus_ger_strike_at_the_source.dds"
  + texturefile = "gfx/interface/lobby_player_mapmode_button_selected.dds"
  }
  spriteType = {
  