When you clicked, and then move towards top-left with the cursor,
and release, the handles were displayed inside the resulting rectangle,
instead of outside.
If this doesn't help we'll need to split the screen capture display
into tiles and display those instead, allowing Qt to only draw
a few of them instead of everything.
When hovering over the "attach file" button in the chat form, an
additional button for the screenshot functionality will 'fly out'
to the left, showing a computer monitor as icon. Leaving the attach
file or the take screenshot button will collapse the fly out again.
Bug: Moving the mouse over the fly out and then back again to the
attach button collapses the fly out. Will sort this out later.
Also used the opportunity to rename headers from hpp -> h extension
I added earlier.
