Added function to remove all text

Author: makermelissa

adafruit_portalbase/__init__.py

@@ -55,7 +55,7 @@ class PortalBase:
 
     """
 
-    # pylint: disable=too-many-instance-attributes, too-many-branches
+    # pylint: disable=too-many-instance-attributes, too-many-branches, too-many-public-methods
     def __init__(
         self,
         network,
@@ -213,6 +213,15 @@ def add_text(
 
     # pylint: enable=too-many-arguments
 
+    def remove_all_text(self, clear_font_cache=False):
+        """Remove all added text.
+
+        :param bool clear_font_cache: Clear the font cache. Defaults to False.
+        """
+        self._text = []
+        if clear_font_cache:
+            self._fonts = {}
+
     def set_text(self, val, index=0):
         """Display text, with indexing into our list of text boxes.