Merge pull request #3574 from pkilar/epassport-disabled-button

Fix ePassport disabled buttons drawing as three bands

CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+- Fixed `tools/ePassport` - a disabled button drew Kivy's banded disabled texture, which left its label unreadable (@pkilar)
 - Fixed `hf 14b` - a card asking for a waiting time extension of 4 or more left the timeout at zero, so any ISO14443-B card needing time to answer looked like it had stopped responding (@pkilar)
 - Fixed `hf mfdes chk` - now handles `-k` user supplied keys properly (@iceman1001)
 - Fixed `BigBuf_Clear_keep_EM()` - now also clear the trace length set (@iceman1001)

tools/ePassport/epassport/ui/app.kv

@@ -7,6 +7,13 @@
 #:import ScanScreen epassport.ui.scan.ScanScreen
 #:import BinButton epassport.ui.widgets.binbutton.BinButton
 
+# Kivy's disabled button texture is pale at the edges and dark in the middle,
+# which stretches into three bands and leaves the label unreadable.  Keep the
+# normal background and let the dimmed text carry the disabled state.
+<Button>:
+    background_disabled_normal: "atlas://data/images/defaulttheme/button"
+    disabled_color: 1, 1, 1, 0.45
+
 <Root>:
     orientation: "vertical"
     canvas.before: