sync non-structured defaults

this is basically all the config except
- `$env.config.explore`
- `$env.config.color_config`
- `$env.config.keybindings`
- `$env.config.menus`
- `$env.config.hooks`
- `$env.config.datetime_format`

crates/nu-protocol/src/config.rs

@@ -132,10 +132,10 @@ impl Default for Config {
 
             explore: HashMap::new(),
 
-            max_history_size: i64::MAX,
+            max_history_size: 100_000,
             sync_history_on_enter: true,
             history_file_format: HistoryFileFormat::PlainText,
-            history_isolation: false,
+            history_isolation: true,
 
             case_sensitive_completions: false,
             quick_completions: true,
@@ -153,9 +153,9 @@ impl Default for Config {
             cursor_shape_vi_normal: NuCursorShape::UnderScore,
 
             color_config: HashMap::new(),
-            use_grid_icons: false,
+            use_grid_icons: true,
             footer_mode: FooterMode::RowCount(25),
-            float_precision: 4,
+            float_precision: 2,
             buffer_editor: String::new(),
             use_ansi_coloring: true,
             bracketed_paste: true,

crates/nu-utils/src/sample_config/default_config.nu

@@ -294,7 +294,7 @@ $env.config = {
   use_grid_icons: true
   footer_mode: "25" # always, never, number_of_rows, auto
   float_precision: 2 # the precision for displaying floats in tables
-  buffer_editor: "emacs" # command that will be used to edit the current line buffer with ctrl+o, if unset fallback to $env.EDITOR and $env.VISUAL
+  buffer_editor: "" # command that will be used to edit the current line buffer with ctrl+o, if unset fallback to $env.EDITOR and $env.VISUAL
   use_ansi_coloring: true
   bracketed_paste: true # enable bracketed paste, currently useless on windows
   edit_mode: emacs # emacs, vi