Change name of display state property

Changed name of display state property from
"active" to "is_awake" to clarify it refers to the
display state.

Author: SAK917

adafruit_displayio_sh1107.py

@@ -72,7 +72,7 @@ def __init__(self, bus, **kwargs):
             #                set page address     = 0xB0 - 0xBF (16 pages)
             SH1107_addressing=True,
         )
-        self._awake = True  # Display starts in active state (_INIT_SEQUENCE)
+        self.is_awake = True  # Display starts in active state (_INIT_SEQUENCE)
 
     @property
     def state(self):
@@ -81,7 +81,7 @@ def state(self):
 
         True if the display is active, False if in sleep mode.
         """
-        return self._awake
+        return self.is_awake
 
     def sleep(self):
         """
@@ -94,14 +94,14 @@ def sleep(self):
         3) Remembers display data and operation mode active prior to sleeping
         4) The MP can access (update) the built-in display RAM
         """
-        if self._awake:
+        if self.is_awake:
             self.bus.send(int(0xAE), "")  # 0xAE = display off, sleep mode
-            self._awake = False
+            self.is_awake = False
 
     def wake(self):
         """
         Wake display from sleep mode
         """
-        if not self._awake:
+        if not self.is_awake:
             self.bus.send(int(0xAF), "")  # 0xAF = display on
-            self._awake = True
+            self.is_awake = True