Closes https://github.com/zed-industries/zed/issues/5275
Double click with `alt` modifier pressed will do the regular word
selection.
Adds a setting to disable this behavior and instead select a word, as in
the regular buffer.
```
// What to do when multibuffer is double clicked in some of its excerpts
// (parts of singleton buffers).
// May take 2 values:
// 1. Behave as a regular buffer and select the whole word.
// "double_click_in_multibuffer": "select"
// 2. Open the excerpt clicked as a new buffer in the new tab (default).
// "double_click_in_multibuffer": "open",
// For the case of "open", regular selection behavior can be achieved by holding `alt` when double clicking.
"double_click_in_multibuffer": "open",
```
Release Notes:
- Made multibuffer to open excerpts in new tabs on double click by
default (changing settings or keeping alt restores the word selection
behavior). ([5275](https://github.com/zed-industries/zed/issues/5275))
Kirill Bulatov
02dcdd0228