Make changes for v0.1.5

    * Fix file popup state change
    * Reduce width of search field by 5
    * Move alpha version indicator
    * Change table labels
    * Fine-tuning of scrollbar

Add changes for v0.1.4

* Update README
* Prevent panic when clipboard creation fails (fixes #6)
* Replace unwrap calls
* Refactor password table scrollbar
* Fix clippy warning
* Improve help instructions

Fix scrollbar style

Fix regression

Add missing keybindings PageUp, PageDown

Update README.md