IMPR: reorganize files, minor updates

src/js/_main/index.js

@@ -0,0 +1,7 @@
+import Events from '../_events';
+import Consts from '../_consts';
+
+import './_visibility';
+import './_touch';
+import './_css-screen-size';
+import './_main';

src/scss/_layout/_forms/index.scss

@@ -0,0 +1 @@
+@import './_basics';

src/scss/_layout/_main/_states/index.scss

@@ -0,0 +1,5 @@
+@import '../../../_variables';
+@import '../../../_animations';
+
+@import './_mobile';
+@import './_network';

src/scss/_layout/_main/index.scss

@@ -0,0 +1,9 @@
+@import '../../_variables';
+@import '../../_animations';
+
+@import './_base';
+@import './_main';
+@import './_alerts';
+
+// states
+@import './_states';

src/scss/_layout/index.scss

@@ -0,0 +1,5 @@
+@import '../_variables';
+@import '../_animations';
+
+@import './_main';
+@import './_forms';