Feature/gb gui (#390)

Implemented new GUI component to handle WMS servers
* Add Lua scripts to support adding GIBS datasets (closes #222)
* Add Lua function to load WMS servers from a predefined file

* Workaround for Visual Studio 15.3 compile fix in Windows headers

* Initial support for parsing GetCapabilities file and automatically add layers

* Add a Trigger property to remove a layer

* Support default servers

* Add default file

* Move WMS server code from GUI component into GlobeBrowsingModule

* Add Lua scripts for loading and removing WMS servers
Automatically load default servers on startup

* Reset tile provider before removing a layer tolimit the crash risk
Add "From focus" button to switch globebrowsing gui to the same node as the focus

* Remove warnings
Remove compile error with nonexisting GDALOpenEx function

modules/globebrowsing/rendering/layer/layer.cpp

@@ -24,6 +24,7 @@
 
 #include <modules/globebrowsing/rendering/layer/layer.h>
 
+#include <modules/globebrowsing/rendering/layer/layergroup.h>
 #include <modules/globebrowsing/rendering/layer/layermanager.h>
 #include <modules/globebrowsing/tile/tileprovider/tileprovider.h>
 #include <modules/globebrowsing/tile/tiletextureinitdata.h>
@@ -71,6 +72,13 @@ namespace {
         "local cache for this layer and will trigger a fresh load of all tiles."
     };
 
+    static const openspace::properties::Property::PropertyInfo RemoveInfo = {
+        "Remove",
+        "Remove",
+        "If this value is triggered, a script will be executed that will remove this "
+        "layer before the next frame."
+    };
+
     static const openspace::properties::Property::PropertyInfo ColorInfo = {
         "Color",
         "Color",
@@ -79,15 +87,18 @@ namespace {
     };
 } // namespace
 
-Layer::Layer(layergroupid::GroupID id, const ghoul::Dictionary& layerDict)
+Layer::Layer(layergroupid::GroupID id, const ghoul::Dictionary& layerDict,
+             LayerGroup& parent)
     : properties::PropertyOwner({
         layerDict.value<std::string>(keyName),
         layerDict.hasKey(keyDescription) ? layerDict.value<std::string>(keyDescription) : ""
     })
+    , _parent(parent)
     , _typeOption(TypeInfo, properties::OptionProperty::DisplayType::Dropdown)
     , _blendModeOption(BlendModeInfo, properties::OptionProperty::DisplayType::Dropdown)
     , _enabled(EnabledInfo, false)
     , _reset(ResetInfo)
+    , _remove(RemoveInfo)
     , _tileProvider(nullptr)
     , _otherTypesProperties({
         { ColorInfo, glm::vec4(1.f), glm::vec4(0.f), glm::vec4(1.f) }
@@ -160,6 +171,14 @@ Layer::Layer(layergroupid::GroupID id, const ghoul::Dictionary& layerDict)
         }
     });
 
+    _remove.onChange([&](){
+        if (_tileProvider) {
+            _tileProvider->reset();
+        }
+
+        _parent.deleteLayer(name());
+    });
+
     _typeOption.onChange([&](){
         removeVisibleProperties();
         _type = static_cast<layergroupid::TypeID>(_typeOption.value());
@@ -190,6 +209,7 @@ Layer::Layer(layergroupid::GroupID id, const ghoul::Dictionary& layerDict)
     addProperty(_blendModeOption);
     addProperty(_enabled);
     addProperty(_reset);
+    addProperty(_remove);
 
     _otherTypesProperties.color.setViewOption(properties::Property::ViewOptions::Color);