refactored entry mask to own window, split windows and config from main app file

src/config.py

@@ -0,0 +1,43 @@
+import os
+from configparser import ConfigParser
+
+
+class Config:
+    parser: ConfigParser
+
+    def __init__(self):
+        """
+        Config parser reading config.ini
+
+        Attributes:
+            self.parser: ConfigParser holding list of sections and options
+            self.__filename: Path and name to the config file
+        """
+        self.parser = ConfigParser()
+
+        self.config_file_name = "config.ini"
+        self.root_path = os.path.dirname(os.path.abspath(__file__))
+        self.config_file = os.path.join(self.root_path, self.config_file_name)
+
+        self._load()
+
+    def _save(self):
+        with open(self.config_file, 'w') as outfile:
+            self.parser.write(outfile)
+
+    def _load(self):
+        self.parser.read(self.config_file)
+
+    def add_section(self, section):
+        self._load()
+        self.parser.add_section(section)
+        self._save()
+
+    def set(self, section: str, option: str, value: str):
+        self._load()
+        self.parser.set(section, option, value)
+        self._save()
+
+    def get(self, section: str, option: str):
+        self._load()
+        return self.parser.get(section, option)