[TASK] Sharer-icons fix, adapt SCSS

Resources/Public/Sass/_sg-news.scss

@@ -315,6 +315,36 @@
 		}
 	}
 
+	&.telegram {
+		a {
+			background-color: $sharer-telegram;
+
+			&:hover {
+				background-color: lighten($sharer-telegram, 5%);
+			}
+		}
+	}
+
+	&.xing {
+		a {
+			background-color: $sharer-xing;
+
+			&:hover {
+				background-color: lighten($sharer-xing, 5%);
+			}
+		}
+	}
+
+	&.linkedin {
+		a {
+			background-color: $sharer-linkedin;
+
+			&:hover {
+				background-color: lighten($sharer-linkedin, 5%);
+			}
+		}
+	}
+
 	.fa {
 		width: 30px;
 		height: 20px;
@@ -366,6 +396,33 @@
 			left: 7px;
 		}
 	}
+
+	.fa-telegram {
+		&::after {
+			@include inline-svg($icon-brands-telegram);
+			width: 20px;
+			height: 20px;
+			left: 7px;
+		}
+	}
+
+	.fa-xing {
+		&::after {
+			@include inline-svg($icon-brands-xing);
+			width: 20px;
+			height: 20px;
+			left: 7px;
+		}
+	}
+
+	.fa-linkedin {
+		&::after {
+			@include inline-svg($icon-brands-linkedin);
+			width: 20px;
+			height: 20px;
+			left: 7px;
+		}
+	}
 }
 
 select[size].tx-sgnews-select.form-control {