Improve layout of control window

[Cimera42]

Improvements to layout of control window

• Auto-fit height of window
• Labels & value readouts for transparency and rotation sliders
• Double click sliders to reset value
• Set slider interval of 1
• Use a custom switch control instead of toggle button for image movement

Improvements to image window

• Prevent clipping of image corners when rotating
• Allow top of image window to go past the top of the screen without snapping back

Screenshot of new layout:

[gamebalance]

I wish there was option to set the actual size of image. So it could be used as reference tool. Right now it opens image in shrinked size.

[Cimera42]

I wish there was option to set the actual size of image. So it could be used as reference tool. Right now it opens image in shrinked size.

I'm not at my computer right now, but there's actually a resize handle on the bottom right of the image that you can drag to resize it.

If you mean setting the size in pixels explicitly through the UI, let me know if that's something you'd want.

On another note, I didn't realise there was a merge conflict with this PR. I should be able to get to it in the next few days.

[gamebalance]

I wish there was option to set the actual size of image. So it could be used as reference tool. Right now it opens image in shrinked size.

I'm not at my computer right now, but there's actually a resize handle on the bottom right of the image that you can drag to resize it.

If you mean setting the size in pixels explicitly through the UI, let me know if that's something you'd want.

On another note, I didn't realise there was a merge conflict with this PR. I should be able to get to it in the next few days.

Yes, I saw it can be resized. I meant the 1 to 1 exact pixel size of the image. So, for example, if the image is 800x600 size then I could have it exactly 800x600 on the screen.

Having an option to setup the size in pixels from the UI could be really good! That way image could be resized into any exact pixel sizes.