show warnings before dismissing prompt, and add to tasks and help

src/components/GiftedDialog.vue

@@ -195,6 +195,45 @@ export default class GiftedDialog extends Vue {
   }
 
   async confirm() {
+    if (!this.activeDid) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "danger",
+          title: "Error",
+          text: "You must select an identifier before you can record a give.",
+        },
+        3000,
+      );
+      return;
+    }
+    if (parseFloat(this.amountInput) < 0) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "danger",
+          text: "You may not send a negative number.",
+          title: "",
+        },
+        2000,
+      );
+      return;
+    }
+    if (!this.description && !parseFloat(this.amountInput)) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "danger",
+          title: "Error",
+          text: `You must enter a description or some number of ${
+            this.libsUtil.UNIT_LONG[this.unitCode]
+          }.`,
+        },
+        2000,
+      );
+      return;
+    }
+
     this.close();
     this.$notify(
       {
@@ -229,32 +268,6 @@ export default class GiftedDialog extends Vue {
     amountInput: number,
     unitCode: string = "HUR",
   ) {
-    if (!this.activeDid) {
-      this.$notify(
-        {
-          group: "alert",
-          type: "danger",
-          title: "Error",
-          text: "You must select an identifier before you can record a give.",
-        },
-        -1,
-      );
-      return;
-    }
-
-    if (!description && !amountInput) {
-      this.$notify(
-        {
-          group: "alert",
-          type: "danger",
-          title: "Error",
-          text: `You must enter a description or some number of ${this.libsUtil.UNIT_LONG[unitCode]}.`,
-        },
-        -1,
-      );
-      return;
-    }
-
     try {
       const identity = await libsUtil.getIdentity(this.activeDid);
       const result = await createAndSubmitGive(