Fix: Card Browser Border and Header Height.

Author: argon2r

AnkiDroid/src/main/java/com/ichi2/anki/browser/BrowserMultiColumnAdapter.kt

@@ -103,7 +103,7 @@ class BrowserMultiColumnAdapter(
                         columnViews.add(this as TextView)
                     }
 
-                    if (index <= value) {
+                    if (index < value) {
                         inflate(R.layout.browser_column_divider)
                     }
                 }

AnkiDroid/src/main/res/drawable/browser_heading_bottom_divider.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="@android:color/transparent" />
+        </shape>
+    </item>
+
+    <item android:gravity="bottom">
+        <shape android:shape="rectangle">
+            <size android:height="1dp" />
+            <solid android:color="?attr/cardBrowserDivider" />
+        </shape>
+    </item>
+</layer-list>

AnkiDroid/src/main/res/drawable/browser_heading_divider.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <!-- 0.5 appears badly aliased on Emulators -->
+    <size android:height="20dp" android:width="0.6dp"/>
+    <solid android:color="?attr/cardBrowserDivider" />
+</shape>

AnkiDroid/src/main/res/layout/browser_column_heading.xml

@@ -16,10 +16,11 @@
 
 <com.ichi2.ui.FixedTextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="0dp"
-    android:layout_height="match_parent"
+    android:layout_height="48dp"
     android:layout_weight="1"
     android:textFontWeight="700"
     android:paddingStart="4dp"
     android:textAppearance="@style/TextAppearance.AppCompat.Widget.TextView.SpinnerItem"
-    android:layout_gravity="center_vertical"
+    android:layout_gravity="center"
+    android:gravity="center"
 />

AnkiDroid/src/main/res/layout/card_browser.xml

@@ -18,12 +18,13 @@
         <LinearLayout
             android:id="@+id/browser_column_headings"
             android:layout_width="match_parent"
-            android:background="?attr/selectableItemBackground"
+            android:layout_height="wrap_content"
+            android:background="@drawable/browser_heading_bottom_divider"
             android:orientation="horizontal"
             android:paddingVertical="2dp"
-            android:layout_height="wrap_content"
-            android:longClickable="true">
-
+            android:longClickable="true"
+            android:divider="@drawable/browser_heading_divider"
+            android:showDividers="middle">
         </LinearLayout>
 
         <com.google.android.material.progressindicator.LinearProgressIndicator