refactor: remove InfoBarWidget in favor of plugin-based one

- Replace direct InfoBarWidget with set_info_labels command that emits
  events to plugins
- Replace mini view widget in favor of plugin-based one
- Add widget registry exposure for code-container and editors-container
- Fix DND mixin exec_with_args call (tuple args issue)
- Add break statements in tabs_widget loops for efficiency
- Add _update_transparency call to BaseContainer

plugins/code/info_bar/plugin.py

@@ -0,0 +1,32 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+from libs.event_factory import Event_Factory, Code_Event_Types
+
+from plugins.plugin_types import PluginCode
+
+from .info_bar_widget import InfoBarWidget
+
+
+
+info_bar_widget = InfoBarWidget()
+
+
+
+class Plugin(PluginCode):
+    def __init__(self):
+        super(Plugin, self).__init__()
+
+
+    def _controller_message(self, event: Code_Event_Types.CodeEvent):
+        if isinstance(event, Code_Event_Types.SetInfoLabelsEvent):
+            info_bar_widget._set_info_labels(*event.info)
+
+    def load(self):
+        header = self.requests_ui_element("header-container")
+        header.add( info_bar_widget )
+
+    def run(self):
+        ...