Use InMemoryHistoryManager from TabShell

Author: pcastornii

weaverbird-gui/src/main/java/com/techsenger/weaverbird/gui/InMemoryHistoryManager.java

@@ -19,6 +19,7 @@
 import com.techsenger.tabshell.core.DefaultShellContext;
 import com.techsenger.tabshell.core.DefaultShellFxView;
 import com.techsenger.tabshell.core.DefaultShellPresenter;
+import com.techsenger.tabshell.core.history.InMemoryHistoryManager;
 import com.techsenger.tabshell.icons.IconStylesheetFactory;
 import com.techsenger.tabshell.layout.tabhost.TabHostFxView;
 import com.techsenger.tabshell.layout.tabhost.TabHostPresenter;