Code cleanup - move loose source and header files in source tree to group folders

Rename all header files with .h extension
Fix function declaration in HamlibTransceiver.h that overrode member function but was not marked override
Remove unused variable in Modulator.cpp
Remove unused files from source tree
Remove duplicate LazyFillComboBox files
Reformat codebase to LLVM C++ standard

JS8_Main/ProcessThread.cpp

@@ -0,0 +1,42 @@
+/**
+ * This file is part of JS8Call.
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ *
+ * (C) 2019 Jordan Sherer <kn4crd@gmail.com> - All Rights Reserved
+ *
+ **/
+#include "ProcessThread.h"
+
+ProcessThread::ProcessThread(QObject *parent) : QThread(parent) {}
+
+ProcessThread::~ProcessThread() { setProcess(nullptr); }
+
+/**
+ * @brief ProcessThread::setProcess
+ * @param proc - process to move to this thread and take ownership
+ */
+void ProcessThread::setProcess(QProcess *proc, int msecs) {
+    if (!m_proc.isNull()) {
+        bool b = m_proc->waitForFinished(msecs);
+        if (!b)
+            m_proc->close();
+        m_proc.reset();
+    }
+
+    if (proc) {
+        proc->moveToThread(this);
+        m_proc.reset(proc);
+    }
+}