fix(developer): Make Details and Build tabs scrollable

Fixes #5238.

The Details and Build tabs have fixed positional content in the Keyboard
Editor, Model Editor, and Package Editor. Sizing the window too small
can cause content to be outside the bounds of the tab. This patch moves
these tabs into scrollboxes (except for Details tabs on Keyboard and
Model editors, which were already in scrollboxes). The remaining tabs
have resizable content. The tabs will still become fairly unusable if
they become too small, but this should be less of a problem than before.