Fixes: https://github.com/go-gitea/gitea/issues/35863
The old code had a conflict between using HTML attributes vs. style
properties where the style was overriding the previously set HTML
attributes:
```html
<img width="300" height="277.02439470988946" style="width: 275px; height: 0px;">
```
I made it so in all cases only `style` properties are used and the
previous width/height values are now set via `style`. Also I did a
number of much-needed typescript improvements to the file.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Fix the issue where the line-button fails to work after selecting a file
from the file tree.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
