Replace is_hidden with hidden in ProgressBar

Reference: aboutcode-org/scancode-toolkit#4369
Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

src/commoncode/cliutils.py

@@ -190,7 +190,7 @@ def make_step(self, n_steps):
     # overriden and copied from Click to work around Click woes for
     # https://github.com/aboutcode-org/scancode-toolkit/issues/2583
     def generator(self):
-        if self.is_hidden:
+        if self.hidden:
             yield from self.iter
         else:
             for rv in self.iter:
@@ -209,7 +209,7 @@ class EnhancedProgressBar(DebuggedProgressBar):
     """
 
     def render_progress(self):
-        if not self.is_hidden:
+        if not self.hidden:
             return super(EnhancedProgressBar, self).render_progress()
 
 
@@ -230,7 +230,7 @@ class ProgressLogger(ProgressBar):
 
     def __init__(self, *args, **kwargs):
         super(ProgressLogger, self).__init__(*args, **kwargs)
-        self.is_hidden = False
+        self.hidden = False
 
     def render_progress(self):
         line = self.format_progress_line()