Added versions to home screen

To overview (when updatable)
  - It is very hard to spot a difference in versions so versions are now regarded as commit messages (after dash [-]) when applicable
      - This will result in more clear, understandable text
      - Bleeding edge (canary) user would see:

        ffed229 > ffe02ed or 19.4 > ffe02ed

        as opposed to:

        19.4-ffed229 (19404)
        19.5-ffe02ed (19501)
      - Regular beta+ user would see:

        19.4 > 19.5
To bottom of the screen
  - This change is with respect to regular user. They don't care which version they run as long as they know that "up-to-date" is a gold standard
  - It takes tons of real-estate on the screen which takes away the glance-ability from the overview.

app/src/main/java/com/topjohnwu/magisk/Info.kt

@@ -6,8 +6,10 @@ import com.topjohnwu.superuser.ShellUtils
 
 object Info {
 
+    @JvmStatic
     var magiskVersionCode = -1
 
+    @JvmStatic
     var magiskVersionString = ""
 
     var remote = UpdateInfo()

app/src/main/java/com/topjohnwu/magisk/redesign/home/HomeViewModel.kt

@@ -44,6 +44,10 @@ class HomeViewModel(
             MagiskState.OBSOLETE -> R.string.obsolete_md2.res()
         }
     }
+    val stateVersionMagisk = Info.magiskVersionString
+    val stateVersionManager = BuildConfig.VERSION_NAME
+    val stateVersionUpdateMagisk = KObservableField("")
+    val stateVersionUpdateManager = KObservableField("")
 
     val stateHideManagerName = R.string.manager.res().let {
         val result = R.string.manager.res()
@@ -80,6 +84,22 @@ class HomeViewModel(
             info.app.isObsolete -> MagiskState.OBSOLETE
             else -> MagiskState.UP_TO_DATE
         }
+
+        stateVersionUpdateMagisk.value = when {
+            info.magisk.isObsolete -> "%s > %s".format(
+                Info.magiskVersionString.clipVersion(),
+                info.magisk.version.clipVersion()
+            )
+            else -> ""
+        }
+
+        stateVersionUpdateManager.value = when {
+            info.app.isObsolete -> "%s > %s".format(
+                BuildConfig.VERSION_NAME.clipVersion(),
+                info.app.version.clipVersion()
+            )
+            else -> ""
+        }
     }
 
     fun onDeletePressed() {}
@@ -97,6 +117,8 @@ val ManagerJson.isUpdateChannelCorrect
 val ManagerJson.isObsolete
     get() = BuildConfig.VERSION_CODE < versionCode
 
+fun String.clipVersion() = substringAfter('-')
+
 inline fun <T : ComparableRvItem<T>> itemBindingOf(
     crossinline body: (ItemBinding<*>) -> Unit = {}
 ) = OnItemBind<T> { itemBinding, _, item ->