Set sidebar min width to 150px to keep readability

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/layout/main-layout.tsx

@@ -54,7 +54,7 @@ class NonInjectedMainLayout extends React.Component<MainLayoutProps & Dependenci
             getCurrentExtent={() => sidebarWidth}
             onDrag={this.onSidebarResize}
             onDoubleClick={() => this.onSidebarResize(defaultSidebarWidth)}
-            minExtent={120}
+            minExtent={150}
             maxExtent={400}
           />
         </div>