[Simulator] Dyanamic Simulator virtual hardware generation and many other improvements (#4260)

* Move simulator widgets to subfolder (no code changes).

* [Simulator] Major Simulator re-structuring to reduce code redundancies and allow for fully dynamic simulated hardware setup:
    SimulatorDialog is no longer sub-classed by individual radio UIs, instead a new class is added which handles just the "skin," LCD, and navigation controls (also makes setting up new models much quicker);
    All radio switches/knobs/sliders are populated dynamically based on loaded hardware configuration data (eeprom/bin), including control types and names (in case of no hardware config data, reasonable "factory defaults" are loaded);
    Starting Horus sim with alternate path for RADIO and MODEL data folders is now supported (.otx file is WIP);
    6-way switch now works properly and various other inconsistencies addressed (eg. some Horus analogs were backwards).

* Add missing OpenTX headers to new files.

* [Simulator] Fix loading of Horus hardware settings from Companion simulation.

* Update Travis CI build environment to Qt 5.7.

* [Simulator] Fix 9X missing colored side LCD images, an #include fix, and some cleanup.

* [TravisCI] Set up for parallel Travis builds and use Qt5.7 (#4263)

* Fix starting Simulator with non-existing file/folder structure (now properly creates new ones as needed, including Horus directories with default radio/model);  Temporarily remove option for using .otx file with Horus (until that feature is added).

* Load correct simulator skin for X7 when launching from Companion.

* X7 hardware defaults changed to match production hardware

* Fix minor compiler warning in mdichild.cpp, and some cleanup in eeprominterface.cpp.

* [Simulator] Centralize radio UI flavor determination.

* [Simulator] Updates:
    Add X7 UI flavor;
    Centralize LCD settings;
    Simplify drawing curved UI widgets;
    LCD color can be changed for any 1/4-bit display radio;
    Slight change on default LCD "off" color;
    Refactor LcdWidget to not use globals.

* [Companion] X7 EEPROM import fix

+ cosmetics
+ compilation error fixed on Manjaro

* [Companion] 9XR-PRO EEPROM import fix

+ cosmetics
+ compilation error fixed on Manjaro

* Navigation fix
French translations

* [X7] Main view cosmetics

* Fix switch/ana custom name import

* [Simulator] Add white border above/below X7 bezel, and use white-colored padding on sides; Adjust X7 default LCD color.

* Does this work? (#4269)

Read an Horus SD card produces a temporary .otx file now

* Bsongis/companion warning before automatic conversions (#4271)

* Does this work?

* Warning before automatic conversions

* Force different file name after conversion (#4272)

* Force different file name after conversion

* More detailed instructions

* [Companion] Files automatically named during XXX => Horus conversions

companion/src/storage/appdata.cpp

@@ -538,6 +538,7 @@ QString AppData::sambaLocation()   { return _sambaLocation;   }
 QString AppData::sambaPort()       { return _sambaPort;       }
 QString AppData::lastSimulator()   { return _lastSimulator;   }
 QString AppData::simuLastEepe()    { return _simuLastEepe;    }
+QString AppData::simuLastFolder()  { return _simuLastFolder;  }
 
 QString AppData::backupDir()       { return _backupDir;       }
 QString AppData::gePath()          { return _gePath;          }
@@ -589,6 +590,7 @@ void AppData::sambaLocation   (const QString     x) { store(x, _sambaLocation,
 void AppData::sambaPort       (const QString     x) { store(x, _sambaPort,       "samba_port"              );}
 void AppData::lastSimulator   (const QString     x) { store(x, _lastSimulator,   "last_simulator"          );}
 void AppData::simuLastEepe    (const QString     x) { store(x, _simuLastEepe,    "simuLastEepe"            );}
+void AppData::simuLastFolder  (const QString     x) { store(x, _simuLastFolder,  "simuLastFolder"          );}
 
 void AppData::backupDir       (const QString     x) { store(x, _backupDir,       "backupPath"              );}
 void AppData::gePath          (const QString     x) { store(x, _gePath,          "gePath"                  );}
@@ -778,6 +780,7 @@ void AppData::init()
     getset( _sambaPort,       "samba_port"              ,"\\USBserial\\COM23" );
     getset( _lastSimulator,   "last_simulator"          ,"" );
     getset( _simuLastEepe,    "simuLastEepe"            ,"" );
+    getset( _simuLastFolder,  "simuLastFolder"          ,"" );
 
     getset( _backupDir,       "backupPath"              ,"" );
     getset( _gePath,          "gePath"                  ,"" );