[arch] improvement -> AUR: the index is not always being updated during the initialization process

CHANGELOG.md

@@ -11,12 +11,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Improvements
 - Arch
-    - AUR: 
+    - AUR
         - upgrade checking now considers modification dates as well (needed because not all AUR packages follow versioning standards)
         - downgrade: using the cached package commit (if available) to determine the correct version to downgrade to (otherwise only the version will be used -> old behavior)
         - history: using the cached package commit (if available) to properly determine the current version (otherwise only the version will be used -> old behavior)
-    - the task responsible for generating a local AUR index is displayed on the initialization dialog 
-    - info window:
+        - the task responsible for generating the local index is displayed on the initialization dialog
+        - the index is not always being updated during the initialization process. It its kept for a period of time controlled by the settings property **aur_idx_exp** (in minutes -> default: 720 = 8 hours.). (P.S: this index is always updated when a package is installed/upgraded)
+        <p align="center">
+            <img src="https://raw.githubusercontent.com/vinifmor/bauh-files/master/pictures/releases/0.9.11/aur_idx_exp.png">
+        </p>
+    
+        - the index is now stored at **~/.cache/bauh/arch/aur/index.txt**.
+    - info window
         - date fields format changed to numbers (e.g: Thu Dec 17 17:19:55 2020 -> 2020-12-17 17:19:55)
 
 ### Fixes
@@ -29,6 +35,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Flatpak
     - crashing for Flatpak 1.6.5 when there are updates [#145](https://github.com/vinifmor/bauh/issues/145)
     - history: not highlighting the correct version (regression introduced **0.9.9**)
+- UI
+    - number input fields are not displaying **0**
 
 
 ## [0.9.10] 2020-12-11