Re-enabled MAVLinkgen as included widget, but now cleanly separated codebase

src/apps/mavlinkgen/ui/XMLCommProtocolWidget.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>XMLCommProtocolWidget</class>
+ <widget class="QWidget" name="XMLCommProtocolWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>846</width>
+    <height>480</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout" rowstretch="1,1,100,1,1,1" columnstretch="1,1,1,100">
+   <property name="topMargin">
+    <number>6</number>
+   </property>
+   <property name="rightMargin">
+    <number>6</number>
+   </property>
+   <property name="bottomMargin">
+    <number>6</number>
+   </property>
+   <property name="spacing">
+    <number>12</number>
+   </property>
+   <item row="0" column="0">
+    <widget class="QLabel" name="fileNameLabel">
+     <property name="maximumSize">
+      <size>
+       <width>300</width>
+       <height>16777215</height>
+      </size>
+     </property>
+     <property name="text">
+      <string>Select input file</string>
+     </property>
+     <property name="scaledContents">
+      <bool>true</bool>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="2">
+    <widget class="QPushButton" name="selectFileButton">
+     <property name="text">
+      <string>Select input file</string>
+     </property>
+     <property name="icon">
+      <iconset resource="../mavlinkgen.qrc">
+       <normaloff>:/images/status/folder-open.svg</normaloff>:/images/status/folder-open.svg</iconset>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="3" rowspan="6">
+    <widget class="QGCMAVLinkTextEdit" name="xmlTextView">
+     <property name="minimumSize">
+      <size>
+       <width>400</width>
+       <height>300</height>
+      </size>
+     </property>
+     <property name="baseSize">
+      <size>
+       <width>800</width>
+       <height>600</height>
+      </size>
+     </property>
+     <property name="readOnly">
+      <bool>false</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0" colspan="2">
+    <widget class="QLabel" name="outputDirNameLabel">
+     <property name="maximumSize">
+      <size>
+       <width>400</width>
+       <height>16777215</height>
+      </size>
+     </property>
+     <property name="text">
+      <string>Select output directory</string>
+     </property>
+     <property name="scaledContents">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="2">
+    <widget class="QPushButton" name="selectOutputButton">
+     <property name="text">
+      <string>Select directory</string>
+     </property>
+     <property name="icon">
+      <iconset resource="../mavlinkgen.qrc">
+       <normaloff>:/images/status/folder-open.svg</normaloff>:/images/status/folder-open.svg</iconset>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0" colspan="3">
+    <widget class="QTreeView" name="xmlTreeView"/>
+   </item>
+   <item row="3" column="0" colspan="2">
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Compile Output</string>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="0" colspan="3">
+    <widget class="QPlainTextEdit" name="compileLog"/>
+   </item>
+   <item row="5" column="0">
+    <widget class="QLabel" name="validXMLLabel">
+     <property name="text">
+      <string>No file loaded</string>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="1">
+    <widget class="QPushButton" name="saveButton">
+     <property name="text">
+      <string>Save file</string>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="2">
+    <widget class="QPushButton" name="generateButton">
+     <property name="text">
+      <string>Save and generate</string>
+     </property>
+     <property name="icon">
+      <iconset resource="../mavlinkgen.qrc">
+       <normaloff>:/images/categories/applications-system.svg</normaloff>:/images/categories/applications-system.svg</iconset>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QGCMAVLinkTextEdit</class>
+   <extends>QTextEdit</extends>
+   <header location="global">QGCMAVLinkTextEdit.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="../mavlinkgen.qrc"/>
+ </resources>
+ <connections/>
+</ui>