change the look of telescope a bit and remove unneeded stuff

after/plugin/telescope.lua

@@ -3,6 +3,7 @@ if not status_ok then
 	return
 end
 local actions = require('telescope.actions')
+local action_layout = require("telescope.actions.layout")
 
 telescope.setup {
   defaults = {
@@ -12,31 +13,27 @@ telescope.setup {
       preview = {' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ' };
     },
     sorting_strategy = 'ascending',
+    -- 'horizontal', 'vertical', 'bottom_pane', or 'cursor'
     layout_strategy = 'bottom_pane',
     layout_config = {
-      height = 0.3,
+      bottom_pane = { height = 0.4, },
     },
     mappings = {
       i = {
+        ["<esc>"] = actions.close,
         ['<C-h>'] = 'which_key',
         ['<C-j>'] = actions.move_selection_next,
         ['<C-k>'] = actions.move_selection_previous,
         ['<C-l>'] = actions.select_default,
         ['<C-u>'] = actions.preview_scrolling_up,
         ['<C-d>'] = actions.preview_scrolling_down,
+        ["<C-p>"] = action_layout.toggle_preview
       },
       n = {
         ["gg"] = actions.move_to_top,
         ["G"] = actions.move_to_bottom,
       },
     },
-    extensions = {
-      ["ui-select"] = {
-        require("telescope.themes").get_ivy {
-          -- even more opts
-        }
-      }
-    },
   }
 }
 telescope.load_extension('file_browser')