Temporarily revert v4 support until its fixed, add some documentation

app/build.gradle

@@ -70,9 +70,17 @@ dexcount {
 dependencies {
     // support libraries
     compile 'com.android.support:palette-v7:23.2.0'
-    compile 'com.android.support:appcompat-v7:23.1.1'
-    compile 'com.android.support:design:23.2.0'
-    compile 'com.android.support:recyclerview-v7:23.2.0'
+    compile('com.android.support:appcompat-v7:23.2.0') {
+        exclude group: 'com.android.support', module: 'support-v4'
+    }
+    compile('com.android.support:design:23.2.0') {
+        exclude group: 'com.android.support', module: 'support-v4'
+    }
+    compile('com.android.support:recyclerview-v7:23.2.0') {
+        exclude group: 'com.android.support', module: 'support-v4'
+    }
+    // Temp downgrade until google fixes the support lib
+    compile 'com.android.support:support-v4:23.1.1'
 
     // html parsing fo reading mode
     compile 'org.jsoup:jsoup:1.8.3'
@@ -100,6 +108,7 @@ dependencies {
     // memory leak analysis
     debugCompile 'com.squareup.leakcanary:leakcanary-android:1.4-beta1'
     releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
+//    compile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
 
     provided 'javax.annotation:jsr250-api:1.0'
 

app/src/main/java/acr/browser/lightning/activity/BrowserActivity.java

@@ -1841,6 +1841,13 @@ public abstract class BrowserActivity extends ThemableBrowserActivity implements
         }
     }
 
+    /**
+     * This method initializes the height of the
+     * view that holds the current WebView. It waits
+     * for the root layout to be laid out before setting
+     * the height as it needs the root layout to be measured
+     * first.
+     */
     private void initializeTabHeight() {
         doOnLayout(mRootLayout, new Runnable() {
             @Override
@@ -1850,6 +1857,13 @@ public abstract class BrowserActivity extends ThemableBrowserActivity implements
         });
     }
 
+    /**
+     * Performs an action when the provided view is laid out.
+     *
+     * @param view     the view to listen to for layouts.
+     * @param runnable the runnable to run when the view is
+     *                 laid out.
+     */
     private static void doOnLayout(@NonNull final View view, @NonNull final Runnable runnable) {
         view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
             @Override
@@ -1864,6 +1878,12 @@ public abstract class BrowserActivity extends ThemableBrowserActivity implements
         });
     }
 
+    /**
+     * This method sets the height of the browser
+     * frame view that holds the current WebView.
+     * It requires the root layout to be properly
+     * laid out in order to set the correct height.
+     */
     private void setTabHeight() {
         if (mRootLayout.getHeight() == 0) {
             mRootLayout.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);