Fix: Display Last Status Mail Sent for monitoring in admin panel correctly.

Naming of column is now also consistent.

server/db/patches/004_fix_up_column_name_for_monitoring.sql

@@ -0,0 +1,45 @@
+-- sqlite only supports a limited subset of ALTER TABLE, thus this workaround
+
+ALTER TABLE node_state RENAME TO tmp_node_state;
+
+CREATE TABLE node_state (
+    id INTEGER PRIMARY KEY,
+
+    mac VARCHAR(17) NOT NULL UNIQUE,
+
+    state VARCHAR(10) NOT NULL,
+    last_seen DATETIME NOT NULL,
+
+    import_timestamp DATETIME NOT NULL,
+
+    last_status_mail_sent DATETIME,
+    last_status_mail_type VARCHAR(20),
+
+    created_at DATETIME DEFAULT (strftime('%s','now')) NOT NULL,
+    modified_at DATETIME DEFAULT (strftime('%s','now')) NOT NULL
+);
+
+INSERT INTO node_state(
+    id,
+    mac,
+    state,
+    last_seen,
+    import_timestamp,
+    last_status_mail_sent,
+    last_status_mail_type,
+    created_at,
+    modified_at
+)
+SELECT
+    id,
+    mac,
+    state,
+    last_seen,
+    import_timestamp,
+    last_status_mail_send,
+    last_status_mail_type,
+    created_at,
+    modified_at
+FROM tmp_node_state;
+
+DROP TABLE tmp_node_state;