Merge branch 'origin/master' into sync/upstream

Conflicts:
	app/javascript/mastodon/components/status_list.js
	app/javascript/mastodon/features/notifications/index.js
	app/javascript/mastodon/features/ui/components/modal_root.js
	app/javascript/mastodon/features/ui/components/onboarding_modal.js
	app/javascript/mastodon/features/ui/index.js
	app/javascript/styles/about.scss
	app/javascript/styles/accounts.scss
	app/javascript/styles/components.scss
	app/presenters/instance_presenter.rb
	app/services/post_status_service.rb
	app/services/reblog_service.rb
	app/views/about/more.html.haml
	app/views/about/show.html.haml
	app/views/accounts/_header.html.haml
	config/webpack/loaders/babel.js
	spec/controllers/api/v1/accounts/credentials_controller_spec.rb

app/javascript/styles/components.scss

@@ -238,6 +238,8 @@
   line-height: 0;
   display: inline-block;
   width: 0;
+  height: 0;
+  position: absolute;
 }
 
 .ellipsis {
@@ -395,6 +397,11 @@
       bottom: -1px;
       right: 8px;
     }
+
+    ::-webkit-scrollbar-track:hover,
+    ::-webkit-scrollbar-track:active {
+      background-color: rgba($base-overlay-background, 0.3);
+    }
   }
 }
 
@@ -1288,6 +1295,8 @@
   strong,
   span {
     display: block;
+    text-overflow: ellipsis;
+    overflow: hidden;
   }
 
   strong {
@@ -2130,7 +2139,7 @@
 
 .character-counter__wrapper {
   line-height: 36px;
-  margin-right: 16px;
+  margin: 0 16px 0 8px;
   padding-top: 10px;
 }
 
@@ -2313,6 +2322,18 @@ button.icon-button.active i.fa-retweet {
   background: lighten($ui-base-color, 8%);
 }
 
+.status-card.horizontal {
+  display: block;
+
+  .status-card__image {
+    width: 100%;
+  }
+
+  .status-card__image-image {
+    border-radius: 4px 4px 0 0;
+  }
+}
+
 .status-card__image-image {
   border-radius: 4px 0 0 4px;
   display: block;
@@ -2671,12 +2692,8 @@ button.icon-button.active i.fa-retweet {
 }
 
 .media-spoiler {
-  align-items: center;
   background: $base-overlay-background;
   color: $primary-text-color;
-  cursor: pointer;
-  display: flex;
-  flex-direction: column;
   border: 0;
   width: 100%;
   height: 100%;
@@ -3533,7 +3550,8 @@ button.icon-button.active i.fa-retweet {
 }
 
 .onboarding-modal,
-.error-modal {
+.error-modal,
+.embed-modal {
   background: $ui-secondary-color;
   color: $ui-base-color;
   border-radius: 8px;
@@ -4348,6 +4366,15 @@ noscript {
     margin: 30px auto;
     color: $ui-secondary-color;
     max-width: 400px;
+
+    a {
+      color: $ui-highlight-color;
+      text-decoration: underline;
+
+      &:hover {
+        text-decoration: none;
+      }
+    }
   }
 }
 
@@ -4455,3 +4482,61 @@ noscript {
     height: 100% !important;
   }
 }
+
+.embed-modal__html {
+  color: $ui-secondary-color;
+  outline: 0;
+  box-sizing: border-box;
+  display: block;
+  width: 100%;
+  border: none;
+  padding: 10px;
+  font-family: 'mastodon-font-monospace', monospace;
+  background: $ui-base-color;
+  color: $ui-primary-color;
+  font-size: 14px;
+  margin: 0;
+  margin-bottom: 15px;
+
+  &::-moz-focus-inner {
+    border: 0;
+  }
+
+  &::-moz-focus-inner,
+  &:focus,
+  &:active {
+    outline: 0 !important;
+  }
+
+  &:focus {
+    background: lighten($ui-base-color, 4%);
+  }
+
+  @media screen and (max-width: 600px) {
+    font-size: 16px;
+  }
+}
+
+.embed-modal {
+  h4 {
+    padding: 30px;
+    font-weight: 500;
+    font-size: 16px;
+    text-align: center;
+  }
+
+  .hint {
+    margin-bottom: 15px;
+  }
+}
+
+.embed-modal__container {
+  padding: 10px;
+}
+
+.embed-modal__iframe {
+  width: 100%;
+  min-width: 400px;
+  overflow: hidden;
+  border: 0;
+}