Replace all .styl files with .scss, move all component files into separate folder

[MAILPOET-1813]

assets/css/src/components/newsletterEditor/contentBlocks/_social.scss

@@ -0,0 +1,133 @@
+$social-block-vertical-padding: 0px;
+
+$social-icon-width: 32px;
+$active-social-icon-set-border-color: #adadad;
+$active-social-icon-set-background-color: #daebf2;
+$social-icon-set-hover-border-color: $primary-active-color;
+
+$tool-inactive-color: #333333;
+$tool-hover-color: #bbbbbb;
+$tool-active-color: #d2d2d4;
+
+$tool-width: 16px;
+
+.mailpoet_social_block {
+  padding-top: $social-block-vertical-padding;
+  padding-bottom: $social-block-vertical-padding;
+
+  .mailpoet_social {
+    text-align: center;
+  }
+}
+
+.mailpoet_social {
+  span {
+    display: inline-block;
+    padding: 2px 3px;
+  }
+
+  span, a,
+  img {
+
+    vertical-align: top;
+  }
+
+  a {
+    cursor: all-scroll;
+  }
+}
+
+.mailpoet_social_icon_set {
+  border: 1px solid transparent;
+  padding: 5px;
+  margin-bottom: 5px;
+
+  &:hover {
+    border: 1px solid $social-icon-set-hover-border-color;
+  }
+
+  img {
+    width: $social-icon-width;
+    height: $social-icon-width;
+    vertical-align: middle;
+    padding: 2px 3px;
+  }
+}
+
+.mailpoet_active_icon_set {
+  border: 1px dashed $active-social-icon-set-border-color;
+  background-color: $active-social-icon-set-background-color;
+}
+
+.mailpoet_social_icon_settings {
+  position: relative;
+
+  padding: 28px 9px, 18px - 10px 9px;
+  margin-bottom: 9px;
+
+  background: $white-color;
+  border: 1px solid $content-border-color;
+}
+
+.mailpoet_social_icon_settings_row {
+  clear: both;
+  overflow: auto;
+  margin-bottom: 10px;
+
+  line-height: 30px;
+}
+
+.mailpoet_social_icon_settings_label {
+  margin-right: 5px;
+  text-align: left;
+
+  .mailpoet_social_icon_image {
+    width: 30px;
+    height: 30px;
+  }
+
+  &.mailpoet_social_icon_image_label {
+    line-height: initial;
+  }
+}
+
+.mailpoet_social_icon_settings_form_element {
+  float: left;
+  width: 100%;
+
+  input, select {
+    width: 100%;
+    height: 30px;
+    box-sizing: border-box;
+    margin: 0;
+    vertical-align: middle;
+    display: inline-block;
+  }
+}
+
+.mailpoet_social_icon_settings_tool {
+  position: absolute;
+  top: 10px;
+
+  .mailpoet_tool_icon {
+    fill: $tool-inactive-color;
+    width: $tool-width;
+    height: $tool-width;
+
+    &:hover {
+      fill: $tool-hover-color;
+    }
+
+    &:active {
+      fill: $primary-active-color;
+    }
+  }
+}
+
+.mailpoet_social_icon_settings_move_icon {
+  right: 5px;
+}
+
+.mailpoet_social_icon_settings_delete_icon {
+  right: 5px + 5px + $tool-width;
+}