Notification system in frontend

- Heatmap worker now reports progress
- Base for new altitude value
- Phones can be marked active

frontend/src/app/_alert/alert/alert.component.scss

@@ -0,0 +1,64 @@
+@keyframes appear {
+    from {
+        transform: translateY(-100px);
+    }
+    to  {
+        transform: translateY(0);
+    }
+}
+
+.alert {
+    display: flex;
+    background-color: #000;
+    width: 100%;
+    height: 3rem;
+    padding-left: 1rem;
+    padding-right: 1rem;
+    margin-bottom: 1.5rem;
+    line-height: 0rem;
+    border-radius: 15px;
+    vertical-align: middle;
+    transition: 0.25s ease;
+    animation: appear 0.5s ease;
+
+    box-shadow:
+        0 4.5px 5.3px rgba(0, 0, 0, 0.121),
+        0 15px 17.9px rgba(0, 0, 0, 0.179),
+        0 67px 80px rgba(0, 0, 0, 0.3);
+
+
+    & .title {
+        font-weight: bolder;
+        padding-right: 1rem;
+        white-space: nowrap;
+        transform: translateY(50%);
+    }
+
+    & .message {
+        width: 100%;
+        text-align: center;
+        transform: translateY(50%);
+    }
+
+    & fa-icon {
+        transform: translateY(30%);
+        scale: 1.2;
+    }
+}
+
+.alert-success {
+    background-color: #0FAE4B !important;
+}
+
+.alert-danger {
+    background-color: #FA2400 !important;
+}
+
+.alert-warning {
+    background-color: #F3CC17 !important;
+}
+
+.fadeOut {
+    transform: scale(0.9);
+    opacity: 0;
+}