Move status tab into its own component

Author: Stephan Dilly

.vscode/launch.json

@@ -0,0 +1,13 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "(OSX) Launch",
+            "type": "lldb",
+            "request": "launch",
+            "program": "${workspaceRoot}/target/debug/gitui",
+            "args": [],
+            "cwd": "${workspaceRoot}",
+        }
+    ]
+}