Fixes transparency themes (Discord's october update)

discord_transparencyfix.css

#app-mount,
.app .layers .layer,
.app .layers .layer>[class*='container-'],
.app .layers,
.channel-members,
.chat .content,
.chat,
.content-region,
.guilds-wrapper,
.messages-wrapper,
.sidebar-region,
.typing,
.ui-standard-sidebar-view,
[class*="channels-"],
[class*='activityFeed-'],
[class*='channels-'] [class*="container-"],
[class*='titleWrapper-'] [class*='title-']
{
  /* Too dark or too bright? Adjust the opacity (`0.5`) to something lower or higher */
  background: rgba(0,0,0,0.5) !important;
}
.chat form
{
  background: transparent !important;
}

.messages-wrapper + form {
  box-shadow: none !important;
}