#1723 Initial commit - audio call management feature.

-Implements Spring Boot and spring dependency injection - significant code refactoring.
-Creates database repository with Calls table
-Implements AudioManager to update database and manage audio recordings.
-Calls paging and searching
-Adds audio recording to wave file and places file in the calls database table.
-Audio spectrum view with 64 bins.
-Updates audio playback manager to process the incoming calls queue and support auto, auto-locked, replay, and mute playback modes.
-Adds channel lock/unlock and mute/unmute features.
-Adds column configuration editor to change column order & visibility and adds table state monitoring to save any user customization of the column ordering.
-Adds call table column sort ordering to the saved table state and restores the sort on application launch.
-Adds audio playback channel view options for: Complete, Standard and Minimal.  Updates user preferences Audio | Playback section to allow user to select preferred view style.

src/main/java/io/github/dsheirer/audio/call/SearchColumn.java

@@ -0,0 +1,54 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.audio.call;
+
+/**
+ * Search columns
+ */
+public enum SearchColumn
+{
+    ANY_ID("Any ID"),
+    TO("To / Alias"),
+    FROM("From / Alias"),
+    CHANNEL("Channel"),
+    PROTOCOL("Protocol"),
+    SITE("Site"),
+    SYSTEM("System"),
+    CALL_TYPE("Type");
+
+    private String mLabel;
+
+    /**
+     * Constructs an instance
+     * @param label to display
+     */
+    private SearchColumn(String label)
+    {
+        mLabel = label;
+    }
+
+    /**
+     * Display label
+     */
+    public String toString()
+    {
+        return mLabel;
+    }
+}