[fix][ui] displaying empty categories

CHANGELOG.md

@@ -12,6 +12,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Web
     - handling unexpected connection errors
     - handling web page fetch errors
+- UI
+    - displaying empty categories
 
 ## [0.9.5] 2020-06-07
 ### Features

bauh/view/qt/commons.py

@@ -32,7 +32,10 @@ def update_info(pkgv: PackageView, pkgs_info: dict):
 
     if pkgv.model.categories:
         for c in pkgv.model.categories:
-            pkgs_info['categories'].add(c.lower())
+            if c:
+                cat = c.lower().strip()
+                if cat:
+                    pkgs_info['categories'].add(cat)
 
     pkgs_info['pkgs'].append(pkgv)
     pkgs_info['not_installed'] += 1 if not pkgv.model.installed else 0

bauh/view/qt/window.py

@@ -559,7 +559,10 @@ class ManageWindow(QWidget):
         for p in self.pkgs_available:
             if p.model.categories:
                 for c in p.model.categories:
-                    categories.add(c.lower())
+                    if c:
+                        cat = c.strip().lower()
+                        if cat:
+                            categories.add(cat)
 
         if categories:
             self._update_categories(categories, keep_selected=True)