Fix "No such file or directory" on tab-completion

Checks if the directory ~/.autorandr exists before searching for profiles.
Example error message:
autorandr -find: `/root/.autorandr/*': No such file or directory
Fix xrandr -q parsing when output contains "primary"

xRandR (in newer versions?) will output an extra columns for primary outputs.
Detect this column and modify the string split and column numbers accordingly.
Workaround xrandr bug: "cannot find crtc for output" - efficient solution

xrandr will typically fail when switching outputs, if the maximum number is already enabled.
This patch will cause xrandr to be called twice:
- First invocation will only disable outputs, freeing up CRTCs
- Second invocation will only enable outputs
Merge branches 'patch-1' and 'patch-2'

Fixes:
- current_cfg_xrandr: do not treat "primary" column as mode+pos
- load_cfg_xrandr: disable outputs before enabling, workaround xrandr "cannot find crtc for output"