reuse "configure" message and simplified tooltip

we'll implement a built-in config dialog for USO styles in the future

_locales/en/messages.json

@@ -734,14 +734,6 @@
     "message": "Installs",
     "description": "Text for label that shows the number of times a search result was installed"
   },
-  "searchResultCustomize": {
-    "message": "Customize",
-    "description": "Text for a button that opens style on userstyles.org for customizing"
-  },
-  "searchResultCustomizeTooltip": {
-    "message": "Open this style on userstyles.org to customize via 'Advanced Style Settings'",
-    "description": "Tooltip for a button that opens style on userstyles.org for customizing"
-  },
   "searchStyles": {
     "message": "Search contents",
     "description": "Label for the search filter textbox on the Manage styles page"

popup.html

@@ -92,8 +92,8 @@
           <button class="search-result-install" i18n-text="installButton"></button>
           <button class="search-result-uninstall hidden" i18n-text="deleteStyleLabel"></button>
           <button class="search-result-customize hidden"
-                  i18n-text="searchResultCustomize"
-                  i18n-title="searchResultCustomizeTooltip"></button>
+                  i18n-text="configureStyle"
+                  i18n-title="configureStyleOnHomepage"></button>
         </div>
         <div class="search-result-overlay">
           <div class="search-result-author">