Indentation by default

[supakeen]

In #277 a default indentation level was implemented for all types of pastes. I've had some remarks that this isn't wanted and as such I'm reverting the change temporarily in #293. This issue was raised in #288. I want to test the behavior as well so that's being tracked in #294.

Let's have a discussion if we want this behavior back again. I'll poke @divSelector as they created the implementation for the defaults and probably have their reasoning.

To recap what this indentation does:

• Typing a tab character into the text area converts it to a configured number of spaces.
• Pressing enter will prefix the new line with the number of leading spaces of the previous line.

I'm in favor of reinstating this behavior for all languages, how about others?

[The-Compiler]

FWIW this will probably break for some languages that enforce tabs (Makefiles come to mind).

Other than that, I'm surprised that people actually type code right in the pastebin.