Resolve "Login screen setup (without backend)"

Closes #19 (closed)

frontend/assets/menu-textures.atlas

 
 menu-textures.png
-size: 512, 512
+size: 1024, 1024
 format: RGBA8888
 filter: Nearest, Nearest
 repeat: none
-main-menu-welcome-box
+black-box
   rotate: false
-  xy: 228, 438
+  xy: 228, 474
   size: 224, 64
   orig: 224, 64
   offset: 0, 0
   index: -1
-menu-background
+black-white-cornered-button
   rotate: false
-  xy: 2, 2
+  xy: 250, 428
+  size: 200, 44
+  orig: 200, 44
+  offset: 0, 0
+  index: -1
+camo-background-landscape
+  rotate: false
+  xy: 2, 540
+  size: 640, 480
+  orig: 640, 480
+  offset: 0, 0
+  index: -1
+camo-background-portrait
+  rotate: false
+  xy: 644, 520
   size: 224, 500
   orig: 224, 500
   offset: 0, 0
   index: -1
-menu-button-rounded
+dark-menu-header
   rotate: false
-  xy: 228, 392
-  size: 200, 44
-  orig: 200, 44
+  xy: 228, 331
+  size: 629, 95
+  orig: 629, 95
+  offset: 0, 0
+  index: -1
+dark-rounded-button
+  rotate: false
+  xy: 2, 2
+  size: 246, 34
+  orig: 246, 34
   offset: 0, 0
   index: -1
-tankwars-logo
+dark-stroked-input-field
   rotate: false
-  xy: 228, 350
+  xy: 454, 471
+  size: 261, 47
+  orig: 261, 47
+  offset: 0, 0
+  index: -1
+frozen-background-portrait
+  rotate: false
+  xy: 2, 38
+  size: 224, 500
+  orig: 224, 500
+  offset: 0, 0
+  index: -1
+logo
+  rotate: false
+  xy: 870, 980
   size: 134, 40
   orig: 134, 40
   offset: 0, 0
   index: -1
+
+menu-textures2.png
+size: 512, 1024
+format: RGBA8888
+filter: Nearest, Nearest
+repeat: none
+camo-background-portrait-blurred
+  rotate: false
+  xy: 2, 2
+  size: 383, 628
+  orig: 383, 628
+  offset: 0, 0
+  index: -1