Fix dark theme issues

customize.dist/src/less2/include/colortheme-dark.less

@@ -220,7 +220,7 @@
 @cp_mentions-hover: @cryptpad_color_help_grey;
 
 // Modals
-@cp_access-overlay: fade(@cryptpad_color_white, 50%);
+@cp_access-overlay: fade(@cp_alertify-bg, 50%);
 @cp_snapshots-hover: @cryptpad_color_help_grey;
 
 // Support
@@ -255,11 +255,9 @@
 @cp_usergrid-selected-fg: @cryptpad_color_white;
 
 // Other
-@cp_shadow-color: rgba(0,0,0,0.4);
-
+@cp_shadow-color: fade(@cryptpad_color_black, 40%);
 
 // Apps
-
 @cp_app-bg: @cryptpad_color_light_grey;
 @cp_app-fg: @cryptpad_text_col;
 
@@ -343,7 +341,6 @@
 @cp_profile-border: @cryptpad_color_help_grey;
 @cp_profile-hint: @cryptpad_color_hint_grey;
 
-
 // SLide
 @cp_slide-fg: @cp_app-fg;
 @cp_slide-css-error: @cryptpad_color_toolbar_grey;

customize.dist/src/less2/include/colortheme.less

@@ -255,7 +255,7 @@
 @cp_usergrid-selected-fg: @cryptpad_color_white;
 
 // Other
-@cp_shadow-color: rgba(0,0,0,0.4);
+@cp_shadow-color: fade(@cryptpad_color_black, 40%);
 
 // Apps
 @cp_app-bg: @cryptpad_color_light_grey;

customize.dist/src/less2/include/messenger.less

@@ -49,6 +49,7 @@
         justify-content: center;
         align-items: center;
         min-height: 0;
+        color: @cp_messenger-fg;
         &.ready {
             background-size: cover;
             background-position: center;