fix crash on small terminals (closes #307)

Author: Stephan Dilly

Diff for: CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - crash when changing git repo while gitui is open ([#271](https://github.com/extrawurst/gitui/issues/271))
+- crash on small terminal size ([#307](https://github.com/extrawurst/gitui/issues/307))
 
 ## [0.10.1] - 2020-09-01
 

Diff for: src/cmdbar.rs

@@ -35,7 +35,7 @@ pub struct CommandBar {
     expanded: bool,
 }
 
-const MORE_WIDTH: u16 = 11;
+const MORE_WIDTH: u16 = 9;
 
 impl CommandBar {
     pub const fn new(
@@ -139,6 +139,10 @@ impl CommandBar {
     }
 
     pub fn draw<B: Backend>(&self, f: &mut Frame<B>, r: Rect) {
+        if r.width < MORE_WIDTH {
+            return;
+        }
+
         let splitter = Text::Raw(Cow::from(strings::cmd_splitter(
             &self.key_config,
         )));