js, css: fix eslint and stylelint warnings.

app/javascript/src/javascripts/posts.js.erb

@@ -303,7 +303,7 @@ Post.initialize_favlist = function() {
 Post.view_original = function(e) {
   if (Utility.test_max_width(660)) {
     // Do the default behavior (navigate to image)
-    return;
+    return false;
   }
 
   var $image = $("#image");
@@ -322,7 +322,7 @@ Post.view_original = function(e) {
 Post.view_large = function(e) {
   if (Utility.test_max_width(660)) {
     // Do the default behavior (navigate to image)
-    return;
+    return false;
   }
 
   var $image = $("#image");
@@ -458,7 +458,7 @@ Post.update = async function(post_id, mode, params) {
 
     Post.pending_update_count -= 1;
     Post.show_pending_update_notice();
-  } catch(err) {
+  } catch (err) {
     Post.pending_update_count -= 1;
   }
 }

app/javascript/src/javascripts/uploads.js.erb

@@ -1,4 +1,3 @@
-import Post from './posts.js.erb'
 import Shortcuts from './shortcuts.js';
 import Utility from './utility.js';
 import Dropzone from 'dropzone';
@@ -6,7 +5,8 @@ import SparkMD5 from 'spark-md5';
 
 let Upload = {};
 
-Upload.MAX_FILE_SIZE = <%= Danbooru.config.max_file_size.to_json %> / (1024 * 1024);
+Upload.MAX_FILE_SIZE_BYTES = <%= Danbooru.config.max_file_size.to_json %>;
+Upload.MAX_FILE_SIZE = Upload.MAX_FILE_SIZE_BYTES / (1024 * 1024);
 Upload.IQDB_LIMIT = 5;
 Upload.IQDB_MIN_SIMILARITY = 50;
 Upload.IQDB_HIGH_SIMILARITY = 70;

app/javascript/src/styles/base/000_vars.scss

@@ -12,6 +12,8 @@ $h1_padding: 0.8em 0 0.25em 0;
 $h2_padding: 0.8em 0 0.25em 0;
 $h3_padding: 0.8em 0 0.25em 0;
 $h4_padding: 0.8em 0 0.25em 0;
+
+/* stylelint-disable-next-line value-keyword-case */
 $base_font_family: Verdana, Helvetica, sans-serif;
 
 @mixin animated-icon {

app/javascript/src/styles/common/versions.scss

@@ -7,7 +7,7 @@ body.a-index {
     }
   }
 
-  div#p-revert-listing  > article.post-preview {
+  div#p-revert-listing > article.post-preview {
     margin-top: 2em;
   }
 }

app/javascript/src/styles/specific/dropzone.scss

@@ -20,7 +20,7 @@
       object-fit: contain;
     }
 
-    .dz-details  {
+    .dz-details {
       margin-bottom: 1em;
 
       .dz-filename, .dz-size {