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Empty variables as parameters cause no window to be drawn on dialog test build 3.0.0.4812

2

**Describe the bug** On build 3.0.0.4812 a command that includes an empty argument causes dialog to hang and not draw a window **To Reproduce** ``` unset testVar /usr/local/bin/dialog --title "test"...

When using `--buttonstyle stack` the order of the buttons is flipped from v. 2 to v. 3

1

**Describe the bug** In Dialog 2.x, when using `--buttonstyle stack` button 1 was on top and button2 was on the bottom. In Dialog 3.x, this is now flipped. Not clear...

Using `hide:` and `show:` with `--blurscreen` causes screen blur to be solid color

2

**Describe the bug** This bug is present in 2.5.6 as well as the latest 3.0beta2 When using dialog with `--blurscreen`, if you issue a `hide:` command to the command file...