SetNextTreeOpened() and rename ShowTooltip->SetTooltip

Conflicts:
	.gitignore
	src/ImGui.NET/ImGui.cs

.gitignore

@@ -253,4 +253,4 @@ Session.vim
 .vscode
 
 # MSVC Stuff
-*.VC.db
+*.VC.db

src/ImGui.NET/ImGui.cs

@@ -788,7 +788,6 @@ namespace ImGuiNET
             ImGuiNative.igNextColumn();
         }
 
-
         public static int GetColumnIndex()
         {
             return ImGuiNative.igGetColumnIndex();
@@ -814,7 +813,6 @@ namespace ImGuiNET
             return ImGuiNative.igGetColumnsCount();
         }
 
-
         public static void OpenPopup(string id)
         {
             ImGuiNative.igOpenPopup(id);
@@ -860,7 +858,7 @@ namespace ImGuiNET
             return ImGuiNative.igIsAnyItemActive();
         }
 
-        public static void ShowTooltip(string text)
+        public static void SetTooltip(string text)
         {
             ImGuiNative.igSetTooltip(text);
         }
@@ -870,6 +868,11 @@ namespace ImGuiNET
             ImGuiNative.igSetNextTreeNodeOpened(opened, SetCondition.Always);
         }
 
+        public static void SetNextTreeNodeOpened(bool opened, SetCondition setCondition)
+        {
+            ImGuiNative.igSetNextTreeNodeOpened(opened, setCondition);
+        }
+
         public static bool TreeNode(string label)
         {
             return ImGuiNative.igTreeNode(label);