Introduce snackbar for toast messages (#352)

Merge branch 'master' into 302-snackbar

Added snackbar to login screen

Co-authored-by: 6543 <6543@noreply.gitea.io>
Reviewed-on: https://gitea.com/gitnex/GitNex/pulls/352

app/src/main/res/layout/activity_login.xml

@@ -5,7 +5,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:background="?attr/primaryBackgroundColor"
     android:orientation="vertical"
-    android:gravity="center">
+    android:gravity="center"
+    android:id="@+id/loginForm">
 
     <LinearLayout
         android:layout_width="match_parent"

app/src/main/res/values/colors.xml

@@ -29,6 +29,7 @@
     <color name="diffRemovedColor">#ffe0e0</color>
     <color name="diffAddedColor">#d6fcd6</color>
     <color name="dividerColorDark">#1d1d1d</color>
+    <color name="lightYellow">#efd34a</color>
 
     <color name="lightThemeTextColor">#646565</color>
     <color name="lightThemeBackground">#f9f9f9</color>

app/src/main/res/values/strings.xml

@@ -100,6 +100,7 @@
     <string name="emptyFieldPassword">Password is required</string>
 
     <string name="checkNetConnection">Cannot access network, please check your Internet connection</string>
+    <string name="netConnectionIsBack">Yay, Internet connection is back</string>
 
     <string name="repoNameErrorEmpty">Repository name is empty</string>
     <string name="repoNameErrorInvalid">Repository name is not valid. [a&#8211;z A&#8211;Z 0&#8211;9 &#8211; _]</string>