[Glitch] Add Keybase integration

Port SCSS changes from a3c41f3532 to glitch-soc

app/javascript/flavours/glitch/styles/forms.scss

@@ -801,3 +801,58 @@ code {
     }
   }
 }
+
+.connection-prompt {
+  margin-bottom: 25px;
+
+  .fa-link {
+    background-color: darken($ui-base-color, 4%);
+    border-radius: 100%;
+    font-size: 24px;
+    padding: 10px;
+  }
+
+  &__column {
+    align-items: center;
+    display: flex;
+    flex: 1;
+    flex-direction: column;
+    flex-shrink: 1;
+
+    &-sep {
+      flex-grow: 0;
+      overflow: visible;
+      position: relative;
+      z-index: 1;
+    }
+  }
+
+  .account__avatar {
+    margin-bottom: 20px;
+  }
+
+  &__connection {
+    background-color: lighten($ui-base-color, 8%);
+    box-shadow: 0 0 15px rgba($base-shadow-color, 0.2);
+    border-radius: 4px;
+    padding: 25px 10px;
+    position: relative;
+    text-align: center;
+
+    &::after {
+      background-color: darken($ui-base-color, 4%);
+      content: '';
+      display: block;
+      height: 100%;
+      left: 50%;
+      position: absolute;
+      width: 1px;
+    }
+  }
+
+  &__row {
+    align-items: center;
+    display: flex;
+    flex-direction: row;
+  }
+}