After hitting `Ctrl+D` or keeping pressing `Ctrl+Alt`, VNote will enter Vim
normal pending mode.
1. Support <num>h,j,k,l to move cursor around;
TODO: Design a finite state machine to handle more Vim commands
elegantly.
Signed-off-by: Le Tan <tamlokveer@gmail.com>
1. Clear existing images deleted by this edit;
2. Clear newly inserted images which were deleted before saving the
file;
Signed-off-by: Le Tan <tamlokveer@gmail.com>
Add configuration "tab_stop_width" and "is_expand_tab". Expand tab to
tab_stop_width spaces if is_expand_tab is true.
Signed-off-by: Le Tan <tamlokveer@gmail.com>
