MD Bookmarks: Fix sidebar min/max width and Add dialog text

chrome/browser/resources/md_bookmarks/toolbar.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_action_menu/cr_action_menu.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_lazy_render/cr_lazy_render.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_toolbar/cr_toolbar.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_toolbar/cr_toolbar_selection_overlay.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://bookmarks/edit_dialog.html">
 <link rel="import" href="chrome://bookmarks/shared_style.html">
 <link rel="stylesheet" href="chrome://resources/css/md_colors.css">
 
 <dom-module id="bookmarks-toolbar">
   <template>
     <style include="shared-style">
       :host {
         background: var(--md-toolbar-color);
-        color: #fff;
         transition: background-color 150ms;
       }
 
       :host([show-selection-overlay]) {
         background: var(--interactive-color);
       }
 
       button.more-actions {
         margin: 4px;
       }
 
       button.more-vert-button div {
         border-color: white;
       }
 
       cr-toolbar,
       cr-toolbar-selection-overlay {
+        color: #fff;
         flex: 1;
       }
 
       cr-toolbar {
         --cr-toolbar-field-margin:
             calc(var(--sidebar-width) + var(--splitter-width));
       }
 
       :host(:not([narrow_])) cr-toolbar-selection-overlay {
         --selection-overlay-padding: var(--card-padding-side);
@@ skipping 42 matching lines @@
     <template is="dom-if" if="[[showSelectionOverlay]]">
       <cr-toolbar-selection-overlay delete-label="$i18n{delete}"
           cancel-label="$i18n{cancel}"
           selection-label="[[getItemsSelectedString_(selectedCount_)]]"
           on-clear-selected-items="onClearSelectionTap_">
       </cr-toolbar-selection-overlay>
     </template>
   </template>
   <script src="chrome://bookmarks/toolbar.js"></script>
 </dom-module>