Some UI annoyances

[sfriesel]

(NB this is not a duplicate of #1526): The cursor in the Pattern Data filter text box keeps blinking when the ImHex loses focus. It should disappear or become static.

The "Open Project" modal window seems to block the main event loop. It causes the main window beneath to be reported as non-responsive.

Selecting a range of bytes by click-dragging in the ASCII column of the hex editor is unreliable. If the initial click happens in the bottom right quadrant of a glyph, the selection will often start only on the next character. Sometimes the selection starts a line further down.

The vertical alignment of the emojis for feedback and interactive help is off by 1 pixel

Thank you for your continued development of this great tool!