Issue #1950700 by xjm: Rename 'Add block' to 'Place block' on the blocks admin page.

core/modules/block/lib/Drupal/block/Plugin/system/plugin_ui/BlockPluginUI.php

@@ -23,14 +23,14 @@
  *   facets = {
  *     "module" = @Translation("Modules")
  *   },
- *   link_title = @Translation("Configure block"),
+ *   link_title = @Translation("Place block"),
  *   manager = "plugin.manager.block",
  *   menu = TRUE,
  *   path = "admin/structure/block/list",
  *   suffix = "add",
  *   task_suffix = "library",
  *   task_title = @Translation("Library"),
- *   title = @Translation("Add block"),
+ *   title = @Translation("Place blocks"),
  *   title_attribute = "admin_label",
  *   type = MENU_LOCAL_ACTION
  * )

core/modules/block/lib/Drupal/block/Tests/BlockLanguageCacheTest.php

@@ -70,7 +70,7 @@ public function testBlockLinks() {
     // Create the block cache for all languages.
     foreach ($this->langcodes as $langcode) {
       $this->drupalGet('admin/structure/block', array('language' => $langcode));
-      $this->clickLink(t('Add block'));
+      $this->clickLink(t('Place blocks'));
     }
 
     // Create a feed in the default language.
@@ -80,7 +80,7 @@ public function testBlockLinks() {
     // Check that the block is listed for all languages.
     foreach ($this->langcodes as $langcode) {
       $this->drupalGet('admin/structure/block', array('language' => $langcode));
-      $this->clickLink(t('Add block'));
+      $this->clickLink(t('Place blocks'));
       $this->assertText($feed->label());
     }
   }