Resolve "Move UpdateIndicator from Alsijil"

Closes #827 (closed)

aleksis/core/frontend/components/generic/UpdateIndicator.vue

+<template>
+  <v-tooltip bottom>
+    <template #activator="{ on, attrs }">
+      <v-btn
+        right
+        icon
+        v-bind="attrs"
+        v-on="on"
+        @click="
+          () => {
+            isAbleToClick ? $emit('manual-update') : null;
+          }
+        "
+        :loading="status === $options.UPDATING"
+      >
+        <v-icon v-if="status !== $options.UPDATING" :color="color">
+          {{ icon }}
+        </v-icon>
+      </v-btn>
+    </template>
+    <span>{{ text }}</span>
+  </v-tooltip>
+</template>
+
+<script>
+export default {
+  ERROR: "ERROR", // Something went wrong
+  SAVED: "SAVED", // Everything alright
+  UPDATING: "UPDATING", // We are sending something to the server
+  CHANGES: "CHANGES", // the user changed something, but it has not been saved yet
+  name: "UpdateIndicator",
+  emits: ["manual-update"],
+  props: {
+    status: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    text() {
+      switch (this.status) {
+        case this.$options.SAVED:
+          return this.$t("status.saved");
+        case this.$options.UPDATING:
+          return this.$t("status.updating");
+        case this.$options.CHANGES:
+          return this.$t("status.changes");
+        default:
+          return this.$t("status.error");
+      }
+    },
+    color() {
+      switch (this.status) {
+        case this.$options.SAVED:
+          return "success";
+        case this.$options.CHANGES:
+          return "secondary";
+        case this.$options.UPDATING:
+          return "secondary";
+        default:
+          return "error";
+      }
+    },
+    icon() {
+      switch (this.status) {
+        case this.$options.SAVED:
+          return "$success";
+        case this.$options.CHANGES:
+          return "mdi-dots-horizontal";
+        default:
+          return "$warning";
+      }
+    },
+    isAbleToClick() {
+      return (
+        this.status === this.$options.CHANGES ||
+        this.status === this.$options.ERROR
+      );
+    },
+  },
+};
+</script>